diff --git a/3d-viewer/3d_cache/3d_cache.cpp b/3d-viewer/3d_cache/3d_cache.cpp
index b9d7f0de0b..5da0737e07 100644
--- a/3d-viewer/3d_cache/3d_cache.cpp
+++ b/3d-viewer/3d_cache/3d_cache.cpp
@@ -101,8 +101,10 @@ static bool isMD5null( const unsigned char* aMD5Sum )
 {
     if( NULL == aMD5Sum )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL passed for aMD5Sum\n";
+        #endif
         return false;
     }
 
@@ -160,8 +162,10 @@ void S3D_CACHE_ENTRY::SetMD5( const unsigned char* aMD5Sum )
 {
     if( NULL == aMD5Sum )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL passed for aMD5Sum\n";
+        #endif
         return;
     }
 
@@ -258,16 +262,17 @@ SCENEGRAPH* S3D_CACHE::checkCache( const wxString& aFileName, S3D_CACHE_ENTRY**
         if( m_CacheMap.insert( std::pair< wxString, S3D_CACHE_ENTRY* >
             ( aFileName, ep ) ).second == false )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] duplicate entry in map file; key = ";
             std::cerr << aFileName.ToUTF8() << "\n";
+            #endif
+
             m_CacheList.pop_back();
             delete ep;
         }
         else
         {
-            std::cerr << " * [3D Model] [0] added cached name '" << aFileName.ToUTF8() << "'\n";
-
             if( aCachePtr )
                 *aCachePtr = ep;
 
@@ -282,17 +287,16 @@ SCENEGRAPH* S3D_CACHE::checkCache( const wxString& aFileName, S3D_CACHE_ENTRY**
     if( m_CacheMap.insert( std::pair< wxString, S3D_CACHE_ENTRY* >
                                ( aFileName, ep ) ).second == false )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] duplicate entry in map file; key = ";
         std::cerr << aFileName.ToUTF8() << "\n";
+        #endif
+
         m_CacheList.pop_back();
         delete ep;
         return NULL;
     }
-    else
-    {
-        std::cerr << " * [3D Model] [1] added cached name '" << aFileName.ToUTF8() << "'\n";
-    }
 
     if( aCachePtr )
         *aCachePtr = ep;
@@ -321,25 +325,28 @@ bool S3D_CACHE::getMD5( const wxString& aFileName, unsigned char* aMD5Sum )
 {
     if( aFileName.empty() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] empty filename\n";
+        #endif
+
         return false;
     }
 
     if( NULL == aMD5Sum )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aMD5Sum\n";
+        #endif
+
         return false;
     }
 
     FILE* fp = fopen( aFileName.ToUTF8(), "rb" );
 
     if( !fp )
-    {
-        std::cerr << " * [3dmodel] could not open file '" << aFileName.ToUTF8() << "'\n";
         return false;
-    }
 
     struct md5_ctx msum;
     md5_init_ctx( &msum );
@@ -348,7 +355,10 @@ bool S3D_CACHE::getMD5( const wxString& aFileName, unsigned char* aMD5Sum )
 
     if( 0 != res )
     {
+        #ifdef DEBUG
         std::cerr << " * [3dmodel] md5 calculation failed on file '" << aFileName.ToUTF8() << "'\n";
+        #endif
+
         return false;
     }
 
@@ -362,13 +372,18 @@ bool S3D_CACHE::loadCacheData( S3D_CACHE_ENTRY* aCacheItem )
 
     if( bname.empty() )
     {
+        #ifdef DEBUG
         std::cerr << " * [3D model] cannot load cached model; no md5 hash available\n";
+        #endif
+
         return false;
     }
 
     if( m_CacheDir.empty() )
     {
-        std::cerr << " * [3D model] cannot load cached model; config directory unknown\n";
+        wxString errmsg = _( "cannot load cached model; config directory unknown" );
+        std::cerr << " * [3D model] " << errmsg.ToUTF8() << "\n";
+
         return false;
     }
 
@@ -376,7 +391,8 @@ bool S3D_CACHE::loadCacheData( S3D_CACHE_ENTRY* aCacheItem )
 
     if( !wxFileName::FileExists( fname ) )
     {
-        std::cerr << " * [3D model] cannot open file '";
+        wxString errmsg = _( "cannot open file" );
+        std::cerr << " * [3D model] " << errmsg.ToUTF8() << " '";
         std::cerr << fname.ToUTF8() << "'\n";
         return false;
     }
@@ -397,15 +413,21 @@ bool S3D_CACHE::saveCacheData( S3D_CACHE_ENTRY* aCacheItem )
 {
     if( NULL == aCacheItem )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * NULL passed for aCacheItem\n";
+        #endif
+
         return false;
     }
 
     if( NULL == aCacheItem->sceneData )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * aCacheItem has no valid scene data\n";
+        #endif
+
         return false;
     }
 
@@ -413,13 +435,18 @@ bool S3D_CACHE::saveCacheData( S3D_CACHE_ENTRY* aCacheItem )
 
     if( bname.empty() )
     {
+        #ifdef DEBUG
         std::cerr << " * [3D model] cannot load cached model; no md5 hash available\n";
+        #endif
+
         return false;
     }
 
     if( m_CacheDir.empty() )
     {
-        std::cerr << " * [3D model] cannot load cached model; config directory unknown\n";
+        wxString errmsg = _( "cannot load cached model; config directory unknown" );
+        std::cerr << " * [3D model] " << errmsg.ToUTF8() << "\n";
+
         return false;
     }
 
@@ -435,8 +462,10 @@ bool S3D_CACHE::saveCacheData( S3D_CACHE_ENTRY* aCacheItem )
 
         if( !S_ISREG( info.st_mode ) )
         {
-            std::cerr << " * [3D model] path exists but is not a regular file: '";
+            wxString errmsg = _( "path exists but is not a regular file" );
+            std::cerr << " * [3D model] " << errmsg.ToUTF8() << " '";
             std::cerr << fname.ToUTF8() << "'\n";
+
             return false;
         }
 
@@ -463,9 +492,12 @@ bool S3D_CACHE::Set3DConfigDir( const wxString& aConfigDir )
         if( !cfgdir.DirExists() )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * failed to create 3D configuration directory\n";
-            std::cerr << " * config directory: '";
+            wxString errmsg = _( "failed to create 3D configuration directory" );
+            std::cerr << " * " << errmsg.ToUTF8() << "\n";
+            errmsg = _( "config directory" );
+            std::cerr << " * " << errmsg.ToUTF8() << " '";
             std::cerr << cfgdir.GetPath().ToUTF8() << "'\n";
+
             return false;
         }
     }
@@ -475,9 +507,11 @@ bool S3D_CACHE::Set3DConfigDir( const wxString& aConfigDir )
     // inform the file resolver of the config directory
     if( !m_FNResolver->Set3DConfigDir( m_ConfigDir ) )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * could not set 3D Config Directory on filename resolver\n";
         std::cerr << " * config directory: '" << m_ConfigDir.ToUTF8() << "'\n";
+        #endif
     }
 
     cfgdir.AppendDir( wxT( "cache" ) );
@@ -489,9 +523,12 @@ bool S3D_CACHE::Set3DConfigDir( const wxString& aConfigDir )
         if( !cfgdir.DirExists() )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * failed to create 3D cache directory\n";
-            std::cerr << " * cache directory: '";
+            wxString errmsg = _( "failed to create 3D cache directory" );
+            std::cerr << " * " << errmsg.ToUTF8() << "\n";
+            errmsg = _( "cache directory" );
+            std::cerr << " * " << errmsg.ToUTF8() << " '";
             std::cerr << cfgdir.GetPath().ToUTF8() << "'\n";
+
             return false;
         }
     }
@@ -543,8 +580,10 @@ wxString S3D_CACHE::Get3DConfigDir( bool createDefault )
 
     if( !cfgpath.DirExists() )
     {
+        wxString errmsg = _( "failed to create 3D configuration directory" );
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * failed to create 3D configuration directory\n";
+        std::cerr << " * " << errmsg.ToUTF8() << "\n";
+
         return wxT( "" );
     }
 
@@ -636,8 +675,11 @@ S3DMODEL* S3D_CACHE::GetModel( const wxString& aModelFileName )
 
     if( !cp )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] model loaded with no associated S3D_CACHE_ENTRY\n";
+        #endif
+
         return NULL;
     }
 
diff --git a/3d-viewer/3d_cache/3d_filename_resolver.cpp b/3d-viewer/3d_cache/3d_filename_resolver.cpp
index cbd7f56e37..a0a34a9be3 100644
--- a/3d-viewer/3d_cache/3d_filename_resolver.cpp
+++ b/3d-viewer/3d_cache/3d_filename_resolver.cpp
@@ -160,14 +160,6 @@ bool S3D_FILENAME_RESOLVER::UpdatePathList( std::vector< wxString >& aPathList )
     for( size_t i = 0; i < nI; ++i )
         addPath( aPathList[i] );
 
-#ifdef DEBUG
-    std::cerr << "* S3D_FILENAME_RESOLVER::UpdatePathList()\n";
-    std::cerr << "NItems: " << aPathList.size() << "\n";
-
-    for( size_t i = 0; i < aPathList.size(); ++i )
-        std::cerr << "Item #" << i << ": " << aPathList[i].ToUTF8() << "\n";
-#endif
-
     return writePathList();
 }
 
@@ -235,7 +227,8 @@ wxString S3D_FILENAME_RESOLVER::ResolvePath( const wxString& aFileName )
         ++sPL;
     }
 
-    std::cerr << " * [3D Model] filename could not be resolved: '";
+    wxString errmsg = _( "filename could not be resolved" );
+    std::cerr << " * [3D Model] " << errmsg.ToUTF8() << " '";
     std::cerr << aFileName.ToUTF8() << "'\n";
 
     return wxEmptyString;
@@ -269,7 +262,9 @@ bool S3D_FILENAME_RESOLVER::addPath( const wxString& aPath )
 
     if( !path.DirExists() )
     {
-        std::cerr << " * [3D Model] invalid path: '" << path.GetPath().ToUTF8() << "'\n";
+        wxString errmsg = _( "invalid path" );
+        std::cerr << " * [3D Model] " << errmsg.ToUTF8() << " '" << path.GetPath().ToUTF8() << "'\n";
+
         return false;
     }
 
@@ -295,7 +290,8 @@ bool S3D_FILENAME_RESOLVER::readPathList( void )
     if( m_ConfigDir.empty() )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * 3D configuration directory is unknown\n";
+        wxString errmsg = _( "3D configuration directory is unknown" );
+        std::cerr << " * " << errmsg.ToUTF8() << "\n";
         return false;
     }
 
@@ -311,7 +307,8 @@ bool S3D_FILENAME_RESOLVER::readPathList( void )
     if( !wxFileName::Exists( cfgname ) )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * no 3D configuration file: '";
+        wxString errmsg = _( "no 3D configuration file" );
+        std::cerr << " * " << errmsg.ToUTF8() << " '";
         std::cerr << cfgname.ToUTF8() << "'\n";
         return false;
     }
@@ -321,7 +318,8 @@ bool S3D_FILENAME_RESOLVER::readPathList( void )
     if( !cfgFile.is_open() )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * could not open configuration file '" << cfgname.ToUTF8() << "'\n";
+        wxString errmsg = _( "could not open configuration file" );
+        std::cerr << " * " << errmsg.ToUTF8() << " '" << cfgname.ToUTF8() << "'\n";
         return false;
     }
 
@@ -347,8 +345,8 @@ bool S3D_FILENAME_RESOLVER::readPathList( void )
         if( std::string::npos == spos )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * bad config entry in config file '" << cfgname.ToUTF8() << "'\n";
-            std::cerr << "   line " << lineno << " [missing opening quote mark]\n";
+            wxString errmsg = _( "missing opening quote mark in config file" );
+            std::cerr << " * " << errmsg.ToUTF8() << " '" << cfgname.ToUTF8() << "'\n";
         }
 
         cfgLine.erase( 0, spos + 1 );
@@ -358,8 +356,8 @@ bool S3D_FILENAME_RESOLVER::readPathList( void )
         if( std::string::npos == spos )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * bad config entry in config file '" << cfgname.ToUTF8() << "'\n";
-            std::cerr << "   line " << lineno << " [missing closing quote mark]\n";
+            wxString errmsg = _( "missing closing quote mark in config file" );
+            std::cerr << " * " << errmsg.ToUTF8() << " '" << cfgname.ToUTF8() << "'\n";
         }
 
         cfgLine.erase( spos );
@@ -367,9 +365,8 @@ bool S3D_FILENAME_RESOLVER::readPathList( void )
         if( !addPath( cfgLine ) )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * bad config entry in config file '" << cfgname.ToUTF8() << "'\n";
-            std::cerr << "   line " << lineno << " [not a valid path]: '";
-            std::cerr << cfgLine << "'\n";
+            wxString errmsg = _( "invalid path in config file" );
+            std::cerr << " * " << errmsg.ToUTF8() << " '" << cfgname.ToUTF8() << "'\n";
             mod = true;
         }
     }
@@ -391,7 +388,8 @@ bool S3D_FILENAME_RESOLVER::writePathList( void )
     if( m_ConfigDir.empty() )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * 3D configuration directory is unknown\n";
+        wxString errmsg = _( "3D configuration directory is unknown" );
+        std::cerr << " * " << errmsg.ToUTF8() << "\n";
         return false;
     }
 
@@ -407,7 +405,8 @@ bool S3D_FILENAME_RESOLVER::writePathList( void )
     if( !cfgFile.is_open() )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * could not open configuration file '" << cfgname.ToUTF8() << "'\n";
+        wxString errmsg = _( "could not open configuration file " );
+        std::cerr << " * " << errmsg.ToUTF8() << " '" << cfgname.ToUTF8() << "'\n";
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/dialogs/panel_prev_model.cpp b/3d-viewer/3d_cache/dialogs/panel_prev_model.cpp
index 6ae7e0ff7d..8cdd725e50 100644
--- a/3d-viewer/3d_cache/dialogs/panel_prev_model.cpp
+++ b/3d-viewer/3d_cache/dialogs/panel_prev_model.cpp
@@ -24,8 +24,8 @@
 #include <3d_model_viewer/c3d_model_viewer.h>
 #include <3d_rendering/3d_render_ogl_legacy/c_ogl_3dmodel.h>
 #include <common_ogl/cogl_att_list.h>
-#include <iostream>
 #include <cstdlib>
+#include <wx/log.h>
 #include <wx/sizer.h>
 #include <wx/valnum.h>
 #include <wx/choice.h>
@@ -701,8 +701,9 @@ void PANEL_PREV_3D::getOrientationVars( SGPOINT& scale, SGPOINT& rotation, SGPOI
 
     if( 0.001 > scale.x || 0.001 > scale.y || 0.001 > scale.z )
     {
-        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [INFO] invalid scale values; setting all to 1.0\n";
+        wxString errmsg = _("[INFO] invalid scale values; setting all to 1.0");
+        wxLogMessage( "%s", errmsg.ToUTF8() );
+
         scale.x = 1.0;
         scale.y = 1.0;
         scale.z = 1.0;
diff --git a/3d-viewer/3d_cache/sg/ifsg_api.cpp b/3d-viewer/3d_cache/sg/ifsg_api.cpp
index 06892be15c..bc5fa6e062 100644
--- a/3d-viewer/3d_cache/sg/ifsg_api.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_api.cpp
@@ -44,7 +44,9 @@
 #include "plugins/3dapi/c3dmodel.h"
 
 
+#ifdef DEBUG
 static char BadNode[] = " * [BUG] NULL pointer passed for aNode\n";
+#endif
 
 static void formatMaterial( SMATERIAL& mat, SGAPPEARANCE const* app )
 {
@@ -111,15 +113,21 @@ bool S3D::WriteVRML( const wxString& filename, bool overwrite, SGNODE* aTopNode,
 
     if( NULL == aTopNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aTopNode\n";
+        #endif
+
         return false;
     }
 
     if( S3D::SGTYPE_TRANSFORM != aTopNode->GetNodeType() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] aTopNode is not a SCENEGRAPH object\n";
+        #endif
+
         return false;
     }
 
@@ -131,7 +139,8 @@ bool S3D::WriteVRML( const wxString& filename, bool overwrite, SGNODE* aTopNode,
     if( !op.is_open() )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [INFO] failed to open file '" << filename.ToUTF8() << "'\n";
+        wxString errmsg = _( "failed to open file" );
+        std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '" << filename.ToUTF8() << "'\n";
         return false;
     }
 
@@ -152,8 +161,11 @@ bool S3D::WriteVRML( const wxString& filename, bool overwrite, SGNODE* aTopNode,
     }
 
     op.close();
+
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-    std::cerr << " * [INFO] problems encountered writing file '" << filename.ToUTF8() << "'\n";
+    wxString errmsg = _( "problems encountered writing file" );
+    std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '" << filename.ToUTF8() << "'\n";
+
     return false;
 }
 
@@ -162,8 +174,11 @@ void S3D::ResetNodeIndex( SGNODE* aNode )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadNode;
+        #endif
+
         return;
     }
 
@@ -177,8 +192,11 @@ void S3D::RenameNodes( SGNODE* aNode )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadNode;
+        #endif
+
         return;
     }
 
@@ -192,8 +210,11 @@ void S3D::DestroyNode( SGNODE* aNode )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadNode;
+        #endif
+
         return;
     }
 
@@ -207,8 +228,11 @@ bool S3D::WriteCache( const wxString& aFileName, bool overwrite, SGNODE* aNode )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadNode;
+        #endif
+
         return false;
     }
 
@@ -218,7 +242,8 @@ bool S3D::WriteCache( const wxString& aFileName, bool overwrite, SGNODE* aNode )
         if( !overwrite )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * [INFO] file exists; not overwriting: '";
+            wxString errmsg = _( "file exists; not overwriting" );
+            std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '";
             std::cerr << aFileName.ToUTF8() << "'\n";
             return false;
         }
@@ -227,7 +252,8 @@ bool S3D::WriteCache( const wxString& aFileName, bool overwrite, SGNODE* aNode )
         if( !wxFileName::FileExists( aFileName ) )
         {
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-            std::cerr << " * [INFO] specified path is a directory: '";
+            wxString errmsg = _( "specified path is a directory" );
+            std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '";
             std::cerr << aFileName.ToUTF8() << "'\n";
             return false;
         }
@@ -240,19 +266,22 @@ bool S3D::WriteCache( const wxString& aFileName, bool overwrite, SGNODE* aNode )
     if( !output.is_open() )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [INFO] failed to open file '" << aFileName.ToUTF8() << "'\n";
+        wxString errmsg = _( "failed to open file" );
+        std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '" << aFileName.ToUTF8() << "'\n";
         return false;
     }
 
     bool rval = aNode->WriteCache( output, NULL );
     output.close();
 
+    #ifdef DEBUG
     if( !rval )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] problems encountered writing cache file '";
         std::cerr << aFileName.ToUTF8() << "'\n";
     }
+    #endif
 
     return rval;
 }
@@ -263,7 +292,8 @@ SGNODE* S3D::ReadCache( const wxString& aFileName )
     if( !wxFileName::FileExists( aFileName ) )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [INFO] no such file: '";
+        wxString errmsg = _( "no such file" );
+        std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '";
         std::cerr << aFileName.ToUTF8() << "'\n";
     }
 
@@ -271,8 +301,10 @@ SGNODE* S3D::ReadCache( const wxString& aFileName )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] failed to instantiate SCENEGRAPH\n";
+        #endif
         return NULL;
     }
 
@@ -283,7 +315,8 @@ SGNODE* S3D::ReadCache( const wxString& aFileName )
     {
         delete np;
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [INFO] failed to open file '";
+        wxString errmsg = _( "failed to open file" );
+        std::cerr << " * [INFO] " << " '";
         std::cerr << aFileName.ToUTF8() << "'\n";
         return NULL;
     }
@@ -295,7 +328,8 @@ SGNODE* S3D::ReadCache( const wxString& aFileName )
     {
         delete np;
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
-        std::cerr << " * [INFO] problems encountered reading cache file '";
+        wxString errmsg = _( "problems encountered reading cache file" );
+        std::cerr << " * [INFO] " << errmsg.ToUTF8() << " '";
         std::cerr << aFileName.ToUTF8() << "'\n";
         return NULL;
     }
diff --git a/3d-viewer/3d_cache/sg/ifsg_appearance.cpp b/3d-viewer/3d_cache/sg/ifsg_appearance.cpp
index 7ac60c449e..bb6a2aea8a 100644
--- a/3d-viewer/3d_cache/sg/ifsg_appearance.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_appearance.cpp
@@ -59,8 +59,12 @@ IFSG_APPEARANCE::IFSG_APPEARANCE( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -75,11 +79,13 @@ IFSG_APPEARANCE::IFSG_APPEARANCE( IFSG_NODE& aParent )
 {
     SGNODE* pp = aParent.GetRawPtr();
 
+    #ifdef DEBUG
     if( ! pp )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
     }
+    #endif
 
     m_node = new SGAPPEARANCE( NULL );
 
@@ -89,8 +95,12 @@ IFSG_APPEARANCE::IFSG_APPEARANCE( IFSG_NODE& aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -132,10 +142,13 @@ bool IFSG_APPEARANCE::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGAPPEARANCE\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -153,8 +166,11 @@ bool IFSG_APPEARANCE::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
@@ -166,8 +182,11 @@ bool IFSG_APPEARANCE::SetEmissive( float aRVal, float aGVal, float aBVal )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -179,8 +198,11 @@ bool IFSG_APPEARANCE::SetEmissive( const SGCOLOR* aRGBColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -192,8 +214,11 @@ bool IFSG_APPEARANCE::SetEmissive( const SGCOLOR& aRGBColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -205,8 +230,11 @@ bool IFSG_APPEARANCE::SetDiffuse( float aRVal, float aGVal, float aBVal )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -218,8 +246,11 @@ bool IFSG_APPEARANCE::SetDiffuse( const SGCOLOR* aRGBColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -231,8 +262,11 @@ bool IFSG_APPEARANCE::SetDiffuse( const SGCOLOR& aRGBColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -244,8 +278,11 @@ bool IFSG_APPEARANCE::SetSpecular( float aRVal, float aGVal, float aBVal )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -257,8 +294,11 @@ bool IFSG_APPEARANCE::SetSpecular( const SGCOLOR* aRGBColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -270,8 +310,11 @@ bool IFSG_APPEARANCE::SetSpecular( const SGCOLOR& aRGBColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -283,15 +326,21 @@ bool IFSG_APPEARANCE::SetAmbient( float aAmbientLight )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
     if( aAmbientLight < 0 || aAmbientLight > 1.0 )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] ambient intensity out of range [0..1]\n";
+        #endif
+
         return false;
     }
 
@@ -304,15 +353,21 @@ bool IFSG_APPEARANCE::SetShininess( float aShininess )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
     if( aShininess < 0 || aShininess > 1.0 )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] shininess out of range [0..1]\n";
+        #endif
+
         return false;
     }
 
@@ -326,15 +381,21 @@ bool IFSG_APPEARANCE::SetTransparency( float aTransparency )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
     if( aTransparency < 0 || aTransparency > 1.0 )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] shininess out of range [0..1]\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_colors.cpp b/3d-viewer/3d_cache/sg/ifsg_colors.cpp
index 9d6edbe9a1..81483a258d 100644
--- a/3d-viewer/3d_cache/sg/ifsg_colors.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_colors.cpp
@@ -57,8 +57,12 @@ IFSG_COLORS::IFSG_COLORS( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -73,11 +77,13 @@ IFSG_COLORS::IFSG_COLORS( IFSG_NODE& aParent )
 {
     SGNODE* pp = aParent.GetRawPtr();
 
+    #ifdef DEBUG
     if( ! pp )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
     }
+    #endif
 
     m_node = new SGCOLORS( NULL );
 
@@ -87,8 +93,12 @@ IFSG_COLORS::IFSG_COLORS( IFSG_NODE& aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -130,10 +140,13 @@ bool IFSG_COLORS::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGCOLORS\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -151,8 +164,11 @@ bool IFSG_COLORS::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
@@ -164,8 +180,11 @@ bool IFSG_COLORS::GetColorList( size_t& aListSize, SGCOLOR*& aColorList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -177,8 +196,11 @@ bool IFSG_COLORS::SetColorList( size_t aListSize, const SGCOLOR* aColorList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -192,8 +214,11 @@ bool IFSG_COLORS::AddColor( double aRedValue, double aGreenValue, double aBlueVa
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -207,8 +232,11 @@ bool IFSG_COLORS::AddColor( const SGCOLOR& aColor )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_coordindex.cpp b/3d-viewer/3d_cache/sg/ifsg_coordindex.cpp
index bad3c2631c..9adeaf840d 100644
--- a/3d-viewer/3d_cache/sg/ifsg_coordindex.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_coordindex.cpp
@@ -58,8 +58,12 @@ IFSG_COORDINDEX::IFSG_COORDINDEX( SGNODE* aParent )
     {
         delete m_node;
         m_node = NULL;
+
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << WrongParent << "\n";
+        #endif
+
         return;
     }
 
@@ -75,8 +79,11 @@ IFSG_COORDINDEX::IFSG_COORDINDEX( IFSG_NODE& aParent )
 
     if( !pp )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return;
     }
 
@@ -84,8 +91,11 @@ IFSG_COORDINDEX::IFSG_COORDINDEX( IFSG_NODE& aParent )
 
     if( !m_node->SetParent( pp ) )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << WrongParent << "\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return;
@@ -128,10 +138,13 @@ bool IFSG_COORDINDEX::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGCOORDINDEX\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -149,8 +162,11 @@ bool IFSG_COORDINDEX::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_coords.cpp b/3d-viewer/3d_cache/sg/ifsg_coords.cpp
index 356f1fb1e7..fd832b7047 100644
--- a/3d-viewer/3d_cache/sg/ifsg_coords.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_coords.cpp
@@ -57,8 +57,12 @@ IFSG_COORDS::IFSG_COORDS( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -73,11 +77,13 @@ IFSG_COORDS::IFSG_COORDS( IFSG_NODE& aParent )
 {
     SGNODE* pp = aParent.GetRawPtr();
 
+    #ifdef DEBUG
     if( ! pp )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
     }
+    #endif
 
     m_node = new SGCOORDS( NULL );
 
@@ -87,8 +93,12 @@ IFSG_COORDS::IFSG_COORDS( IFSG_NODE& aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -130,10 +140,13 @@ bool IFSG_COORDS::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGCOORDS\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -151,8 +164,11 @@ bool IFSG_COORDS::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
@@ -164,8 +180,11 @@ bool IFSG_COORDS::GetCoordsList( size_t& aListSize, SGPOINT*& aCoordsList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -177,8 +196,11 @@ bool IFSG_COORDS::SetCoordsList( size_t aListSize, const SGPOINT* aCoordsList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -192,8 +214,11 @@ bool IFSG_COORDS::AddCoord( double aXValue, double aYValue, double aZValue )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -207,8 +232,11 @@ bool IFSG_COORDS::AddCoord( const SGPOINT& aPoint )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_faceset.cpp b/3d-viewer/3d_cache/sg/ifsg_faceset.cpp
index ca81a7de57..3c2b3b7354 100644
--- a/3d-viewer/3d_cache/sg/ifsg_faceset.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_faceset.cpp
@@ -58,8 +58,12 @@ IFSG_FACESET::IFSG_FACESET( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -74,11 +78,13 @@ IFSG_FACESET::IFSG_FACESET( IFSG_NODE& aParent )
 {
     SGNODE* pp = aParent.GetRawPtr();
 
+    #ifdef DEBUG
     if( ! pp )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
     }
+    #endif
 
     m_node = new SGFACESET( NULL );
 
@@ -88,8 +94,12 @@ IFSG_FACESET::IFSG_FACESET( IFSG_NODE& aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -131,10 +141,13 @@ bool IFSG_FACESET::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGFACESET\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -152,8 +165,11 @@ bool IFSG_FACESET::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_index.cpp b/3d-viewer/3d_cache/sg/ifsg_index.cpp
index 5209f7dfb0..4bba5367c9 100644
--- a/3d-viewer/3d_cache/sg/ifsg_index.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_index.cpp
@@ -43,8 +43,11 @@ bool IFSG_INDEX::GetIndices( size_t& nIndices, int*& aIndexList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -56,8 +59,11 @@ bool IFSG_INDEX::SetIndices( size_t nIndices, int* aIndexList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -71,8 +77,11 @@ bool IFSG_INDEX::AddIndex( int aIndex )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_node.cpp b/3d-viewer/3d_cache/sg/ifsg_node.cpp
index f4113e66e5..ad21ef7093 100644
--- a/3d-viewer/3d_cache/sg/ifsg_node.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_node.cpp
@@ -70,8 +70,11 @@ S3D::SGTYPES IFSG_NODE::GetNodeType( void ) const
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return S3D::SGTYPE_END;
     }
 
@@ -83,8 +86,11 @@ SGNODE* IFSG_NODE::GetParent( void ) const
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return NULL;
     }
 
@@ -96,8 +102,11 @@ bool IFSG_NODE::SetParent( SGNODE* aParent )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -109,8 +118,11 @@ const char* IFSG_NODE::GetName( void )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return NULL;
     }
 
@@ -122,8 +134,11 @@ bool IFSG_NODE::SetName( const char *aName )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -136,8 +151,11 @@ const char * IFSG_NODE::GetNodeTypeName( S3D::SGTYPES aNodeType ) const
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return NULL;
     }
 
@@ -149,8 +167,11 @@ SGNODE* IFSG_NODE::FindNode( const char *aNodeName )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return NULL;
     }
 
@@ -162,8 +183,11 @@ bool IFSG_NODE::AddRefNode( SGNODE* aNode )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -175,8 +199,11 @@ bool IFSG_NODE::AddRefNode( IFSG_NODE& aNode )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -184,8 +211,11 @@ bool IFSG_NODE::AddRefNode( IFSG_NODE& aNode )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadOperand << "\n";
+        #endif
+
         return false;
     }
 
@@ -197,8 +227,11 @@ bool IFSG_NODE::AddChildNode( SGNODE* aNode )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -210,8 +243,11 @@ bool IFSG_NODE::AddChildNode( IFSG_NODE& aNode )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -219,8 +255,11 @@ bool IFSG_NODE::AddChildNode( IFSG_NODE& aNode )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadOperand << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_normals.cpp b/3d-viewer/3d_cache/sg/ifsg_normals.cpp
index c2d1cc0c81..d17d8a5989 100644
--- a/3d-viewer/3d_cache/sg/ifsg_normals.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_normals.cpp
@@ -59,8 +59,12 @@ IFSG_NORMALS::IFSG_NORMALS( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -75,11 +79,13 @@ IFSG_NORMALS::IFSG_NORMALS( IFSG_NODE& aParent )
 {
     SGNODE* pp = aParent.GetRawPtr();
 
+    #ifdef DEBUG
     if( ! pp )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
     }
+    #endif
 
     m_node = new SGNORMALS( NULL );
 
@@ -89,8 +95,12 @@ IFSG_NORMALS::IFSG_NORMALS( IFSG_NODE& aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -132,10 +142,13 @@ bool IFSG_NORMALS::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGNORMALS\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -153,8 +166,11 @@ bool IFSG_NORMALS::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
@@ -166,8 +182,11 @@ bool IFSG_NORMALS::GetNormalList( size_t& aListSize, SGVECTOR*& aNormalList )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -179,8 +198,11 @@ bool IFSG_NORMALS::SetNormalList( size_t aListSize, const SGVECTOR* aNormalList
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -193,8 +215,11 @@ bool IFSG_NORMALS::AddNormal( double aXValue, double aYValue, double aZValue )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -207,8 +232,11 @@ bool IFSG_NORMALS::AddNormal( const SGVECTOR& aNormal )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_shape.cpp b/3d-viewer/3d_cache/sg/ifsg_shape.cpp
index 712f7b2006..fa7b695d5f 100644
--- a/3d-viewer/3d_cache/sg/ifsg_shape.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_shape.cpp
@@ -59,8 +59,12 @@ IFSG_SHAPE::IFSG_SHAPE( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -75,11 +79,13 @@ IFSG_SHAPE::IFSG_SHAPE( IFSG_NODE& aParent )
 {
     SGNODE* pp = aParent.GetRawPtr();
 
+    #ifdef DEBUG
     if( ! pp )
     {
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
     }
+    #endif
 
     m_node = new SGSHAPE( NULL );
 
@@ -89,8 +95,12 @@ IFSG_SHAPE::IFSG_SHAPE( IFSG_NODE& aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -132,10 +142,13 @@ bool IFSG_SHAPE::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SGSHAPE\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -153,8 +166,11 @@ bool IFSG_SHAPE::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/ifsg_transform.cpp b/3d-viewer/3d_cache/sg/ifsg_transform.cpp
index af72ae46e6..a9b0c040a9 100644
--- a/3d-viewer/3d_cache/sg/ifsg_transform.cpp
+++ b/3d-viewer/3d_cache/sg/ifsg_transform.cpp
@@ -58,8 +58,12 @@ IFSG_TRANSFORM::IFSG_TRANSFORM( SGNODE* aParent )
         {
             delete m_node;
             m_node = NULL;
+
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << WrongParent << "\n";
+            #endif
+
             return;
         }
 
@@ -101,10 +105,13 @@ bool IFSG_TRANSFORM::NewNode( SGNODE* aParent )
 
     if( aParent != m_node->GetParent() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid SGNODE parent (";
         std::cerr << aParent->GetNodeTypeName( aParent->GetNodeType() );
         std::cerr << ") to SCENEGRAPH\n";
+        #endif
+
         delete m_node;
         m_node = NULL;
         return false;
@@ -122,8 +129,11 @@ bool IFSG_TRANSFORM::NewNode( IFSG_NODE& aParent )
 
     if( NULL == np )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadParent << "\n";
+        #endif
+
         return false;
     }
 
@@ -135,8 +145,11 @@ bool IFSG_TRANSFORM::SetRotation( const SGVECTOR& aRotationAxis, double aAngle )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -151,8 +164,11 @@ bool IFSG_TRANSFORM::SetScale( const SGPOINT& aScale )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -166,15 +182,21 @@ bool IFSG_TRANSFORM::SetScale( double aScale )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
     if( aScale < 1e-8 && aScale > -1e-8 )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] |scale| is < 1e-8 - this seems strange\n";
+        #endif
+
         return false;
     }
 
@@ -188,8 +210,11 @@ bool IFSG_TRANSFORM::SetTranslation( const SGPOINT& aTranslation )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -203,8 +228,11 @@ bool IFSG_TRANSFORM::SetScaleOrientation( const SGVECTOR& aScaleAxis, double aAn
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
@@ -219,8 +247,11 @@ bool IFSG_TRANSFORM::SetCenter( const SGPOINT& aCenter )
 {
     if( NULL == m_node )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << BadObject << "\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/scenegraph.cpp b/3d-viewer/3d_cache/sg/scenegraph.cpp
index 8711ecd26f..0aee4bf713 100644
--- a/3d-viewer/3d_cache/sg/scenegraph.cpp
+++ b/3d-viewer/3d_cache/sg/scenegraph.cpp
@@ -132,8 +132,10 @@ void SCENEGRAPH::unlinkNode( const SGNODE* aNode, bool isChild )
     UNLINK_NODE( S3D::SGTYPE_TRANSFORM, SCENEGRAPH, aNode, m_Transforms, m_RTransforms, isChild );
     UNLINK_NODE( S3D::SGTYPE_SHAPE, SGSHAPE, aNode, m_Shape, m_RShape, isChild );
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unlinkNode() did not find its target\n";
+    #endif
 
     return;
 }
@@ -157,17 +159,23 @@ bool SCENEGRAPH::addNode( SGNODE* aNode, bool isChild )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aNode\n";
+        #endif
+
         return false;
     }
 
     ADD_NODE( S3D::SGTYPE_TRANSFORM, SCENEGRAPH, aNode, m_Transforms, m_RTransforms, isChild );
     ADD_NODE( S3D::SGTYPE_SHAPE, SGSHAPE, aNode, m_Shape, m_RShape, isChild );
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] object '" << aNode->GetName();
     std::cerr << "' is not a valid type for this object (" << aNode->GetNodeType() << ")\n";
+    #endif
+
     return false;
 }
 
@@ -333,8 +341,11 @@ bool SCENEGRAPH::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
@@ -347,8 +358,11 @@ bool SCENEGRAPH::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( aFile.fail() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -378,8 +392,11 @@ bool SCENEGRAPH::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( !m_Transforms[i]->WriteCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] bad stream while writing child transforms\n";
+            #endif
+
             return false;
         }
     }
@@ -395,8 +412,11 @@ bool SCENEGRAPH::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( !m_Shape[i]->WriteCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] bad stream while writing child shapes\n";
+            #endif
+
             return false;
         }
     }
@@ -418,8 +438,11 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     if( !m_Transforms.empty() || !m_RTransforms.empty()
         || !m_Shape.empty() || !m_RShape.empty() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
@@ -430,9 +453,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
         // we need to read the tag and verify its type
         if( S3D::SGTYPE_TRANSFORM != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; tag mismatch at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -465,9 +491,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_TRANSFORM != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child transform tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -476,9 +505,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !sp->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading transform '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -488,9 +520,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_TRANSFORM != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref transform tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -498,17 +533,23 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !sp )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref transform '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_TRANSFORM != sp->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not TRANSFORM '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
@@ -520,9 +561,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_SHAPE != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child shape tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -531,9 +575,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !sp->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading shape '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -543,9 +590,12 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_SHAPE != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref shape tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -553,17 +603,23 @@ bool SCENEGRAPH::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !sp )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref shape '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_SHAPE != sp->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not SGSHAPE '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
diff --git a/3d-viewer/3d_cache/sg/sg_appearance.cpp b/3d-viewer/3d_cache/sg/sg_appearance.cpp
index 26cfd1d65f..5163cf44f0 100644
--- a/3d-viewer/3d_cache/sg/sg_appearance.cpp
+++ b/3d-viewer/3d_cache/sg/sg_appearance.cpp
@@ -102,8 +102,11 @@ bool SGAPPEARANCE::SetEmissive( const SGCOLOR* aRGBColor )
 {
     if( NULL == aRGBColor )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aRGBColor\n";
+        #endif
+
         return false;
     }
 
@@ -127,8 +130,11 @@ bool SGAPPEARANCE::SetDiffuse( const SGCOLOR* aRGBColor )
 {
     if( NULL == aRGBColor )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aRGBColor\n";
+        #endif
+
         return false;
     }
 
@@ -152,8 +158,11 @@ bool SGAPPEARANCE::SetSpecular( const SGCOLOR* aRGBColor )
 {
     if( NULL == aRGBColor )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aRGBColor\n";
+        #endif
+
         return false;
     }
 
@@ -180,32 +189,44 @@ SGNODE* SGAPPEARANCE::FindNode(const char *aNodeName, const SGNODE *aCaller)
 
 void SGAPPEARANCE::unlinkChildNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 void SGAPPEARANCE::unlinkRefNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 bool SGAPPEARANCE::AddRefNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
 
 bool SGAPPEARANCE::AddChildNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
@@ -289,8 +310,11 @@ bool SGAPPEARANCE::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -304,15 +328,21 @@ bool SGAPPEARANCE::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_base.cpp b/3d-viewer/3d_cache/sg/sg_base.cpp
index c21c094231..7598fa2008 100644
--- a/3d-viewer/3d_cache/sg/sg_base.cpp
+++ b/3d-viewer/3d_cache/sg/sg_base.cpp
@@ -79,8 +79,11 @@ void SGCOLOR::GetColor( SGCOLOR* aColor ) const
 {
     if( NULL == aColor )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aColor\n";
+        #endif
+
         return;
     }
 
@@ -117,8 +120,11 @@ bool SGCOLOR::SetColor( const SGCOLOR* aColor )
 {
     if( NULL == aColor )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aColor\n";
+        #endif
+
         return false;
     }
 
@@ -209,8 +215,11 @@ void SGPOINT::GetPoint( SGPOINT* aPoint )
 {
     if( NULL == aPoint )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aPoint\n";
+        #endif
+
         return;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_colors.cpp b/3d-viewer/3d_cache/sg/sg_colors.cpp
index d8dd7904ba..d6f62b7ac1 100644
--- a/3d-viewer/3d_cache/sg/sg_colors.cpp
+++ b/3d-viewer/3d_cache/sg/sg_colors.cpp
@@ -99,32 +99,44 @@ SGNODE* SGCOLORS::FindNode(const char *aNodeName, const SGNODE *aCaller)
 
 void SGCOLORS::unlinkChildNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 void SGCOLORS::unlinkRefNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 bool SGCOLORS::AddRefNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
 
 bool SGCOLORS::AddChildNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
@@ -246,8 +258,11 @@ bool SGCOLORS::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -261,15 +276,21 @@ bool SGCOLORS::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -291,8 +312,11 @@ bool SGCOLORS::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 {
     if( !colors.empty() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_coords.cpp b/3d-viewer/3d_cache/sg/sg_coords.cpp
index 0844280fc1..94d818ea7c 100644
--- a/3d-viewer/3d_cache/sg/sg_coords.cpp
+++ b/3d-viewer/3d_cache/sg/sg_coords.cpp
@@ -102,32 +102,44 @@ SGNODE* SGCOORDS::FindNode(const char *aNodeName, const SGNODE *aCaller)
 
 void SGCOORDS::unlinkChildNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 void SGCOORDS::unlinkRefNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 bool SGCOORDS::AddRefNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
 
 bool SGCOORDS::AddChildNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
@@ -247,8 +259,11 @@ bool SGCOORDS::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -262,15 +277,21 @@ bool SGCOORDS::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -292,8 +313,11 @@ bool SGCOORDS::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 {
     if( !coords.empty() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_faceset.cpp b/3d-viewer/3d_cache/sg/sg_faceset.cpp
index 64b63ab2e8..7bde9e3bee 100644
--- a/3d-viewer/3d_cache/sg/sg_faceset.cpp
+++ b/3d-viewer/3d_cache/sg/sg_faceset.cpp
@@ -251,8 +251,10 @@ void SGFACESET::unlinkNode( const SGNODE* aNode, bool isChild )
         }
     }
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unlinkNode() did not find its target\n";
+    #endif
 
     return;
 }
@@ -277,8 +279,11 @@ bool SGFACESET::addNode( SGNODE* aNode, bool isChild )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aNode\n";
+        #endif
+
         return false;
     }
 
@@ -291,8 +296,11 @@ bool SGFACESET::addNode( SGNODE* aNode, bool isChild )
         {
             if( aNode != m_Colors && aNode != m_RColors )
             {
+                #ifdef DEBUG
                 std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                 std::cerr << " * [BUG] assigning multiple Colors nodes\n";
+                #endif
+
                 return false;
             }
 
@@ -319,8 +327,11 @@ bool SGFACESET::addNode( SGNODE* aNode, bool isChild )
         {
             if( aNode != m_Coords && aNode != m_RCoords )
             {
+                #ifdef DEBUG
                 std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                 std::cerr << " * [BUG] assigning multiple Coords nodes\n";
+                #endif
+
                 return false;
             }
 
@@ -347,8 +358,11 @@ bool SGFACESET::addNode( SGNODE* aNode, bool isChild )
         {
             if( aNode != m_Normals && aNode != m_RNormals )
             {
+                #ifdef DEBUG
                 std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                 std::cerr << " * [BUG] assigning multiple Normals nodes\n";
+                #endif
+
                 return false;
             }
 
@@ -375,8 +389,11 @@ bool SGFACESET::addNode( SGNODE* aNode, bool isChild )
         {
             if( aNode != m_CoordIndices )
             {
+                #ifdef DEBUG
                 std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                 std::cerr << " * [BUG] assigning multiple CoordIndex nodes\n";
+                #endif
+
                 return false;
             }
 
@@ -389,10 +406,12 @@ bool SGFACESET::addNode( SGNODE* aNode, bool isChild )
         return true;
     }
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] object '" << aNode->GetName();
     std::cerr << "' (type " << aNode->GetNodeType();
     std::cerr << ") is not a valid type for this object (" << aNode->GetNodeType() << ")\n";
+    #endif
 
     return false;
 }
@@ -501,8 +520,11 @@ bool SGFACESET::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -516,15 +538,21 @@ bool SGFACESET::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -601,8 +629,11 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
         || m_Colors || m_RColors
         || m_Normals || m_RNormals )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
@@ -615,9 +646,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     if( ( items[0] && items[1] ) || ( items[3] && items[4] )
         || ( items[5] && items[6] ) )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] corrupt data; multiple item definitions at position ";
         std::cerr << aFile.tellg() << "\n";
+        #endif
+
         return false;
     }
 
@@ -627,9 +661,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_COORDS != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child coords tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -638,9 +675,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !m_Coords->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading coords '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -649,9 +689,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_COORDS != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref coords tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -659,17 +702,23 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !np )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref coords '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_COORDS != np->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not SGCOORDS '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
@@ -681,9 +730,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_COORDINDEX != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad coord index tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -692,9 +744,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !m_CoordIndices->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading coord index '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -703,9 +758,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_NORMALS != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child normals tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -714,9 +772,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !m_Normals->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading normals '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -725,9 +786,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_NORMALS != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref normals tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -735,17 +799,23 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !np )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref normals '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_NORMALS != np->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not SGNORMALS '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
@@ -757,9 +827,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_COLORS != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child colors tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -768,9 +841,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !m_Colors->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading colors '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -779,9 +855,12 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_COLORS != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref colors tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -789,17 +868,23 @@ bool SGFACESET::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !np )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref colors '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_COLORS != np->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not SGCOLORS '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
diff --git a/3d-viewer/3d_cache/sg/sg_helpers.cpp b/3d-viewer/3d_cache/sg/sg_helpers.cpp
index f770b3c680..a22d54f1dc 100644
--- a/3d-viewer/3d_cache/sg/sg_helpers.cpp
+++ b/3d-viewer/3d_cache/sg/sg_helpers.cpp
@@ -208,9 +208,12 @@ S3D::SGTYPES S3D::ReadTag( std::ifstream& aFile, std::string& aName )
 
     if( '[' != schar )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] corrupt data; missing left bracket at position ";
         std::cerr << aFile.tellg() << "\n";
+        #endif
+
         return S3D::SGTYPE_END;
     }
 
@@ -225,8 +228,11 @@ S3D::SGTYPES S3D::ReadTag( std::ifstream& aFile, std::string& aName )
 
     if( schar != ']' )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] corrupt data; could not find right bracket\n";
+        #endif
+
         return S3D::SGTYPE_END;
     }
 
@@ -235,9 +241,12 @@ S3D::SGTYPES S3D::ReadTag( std::ifstream& aFile, std::string& aName )
 
     if( std::string::npos == upos )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] corrupt data; no underscore in name '";
         std::cerr << name << "'\n";
+        #endif
+
         return S3D::SGTYPE_END;
     }
 
@@ -260,9 +269,12 @@ S3D::SGTYPES S3D::ReadTag( std::ifstream& aFile, std::string& aName )
             return types[i];
     }
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [INFO] corrupt data; no node type matching '";
     std::cerr << name << "'\n";
+    #endif
+
     return S3D::SGTYPE_END;
 }
 
@@ -491,8 +503,11 @@ bool S3D::CalcTriangleNormals( std::vector< SGPOINT > coords,
 
     if( norms.size() != coords.size() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] number of normals does not equal number of vertices\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_index.cpp b/3d-viewer/3d_cache/sg/sg_index.cpp
index 51015138eb..9bc245b33a 100644
--- a/3d-viewer/3d_cache/sg/sg_index.cpp
+++ b/3d-viewer/3d_cache/sg/sg_index.cpp
@@ -94,32 +94,44 @@ SGNODE* SGINDEX::FindNode(const char *aNodeName, const SGNODE *aCaller)
 
 void SGINDEX::unlinkChildNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 void SGINDEX::unlinkRefNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 bool SGINDEX::AddRefNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
 
 bool SGINDEX::AddChildNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
@@ -188,8 +200,11 @@ bool SGINDEX::writeCoordIndex( std::ofstream& aFile )
 
     if( n % 3 )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] coord index is not divisible by three (violates triangle constraint)\n";
+        #endif
+
         return false;
     }
 
@@ -271,8 +286,11 @@ bool SGINDEX::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -286,15 +304,21 @@ bool SGINDEX::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -316,8 +340,11 @@ bool SGINDEX::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 {
     if( !index.empty() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_node.cpp b/3d-viewer/3d_cache/sg/sg_node.cpp
index 198433322d..5c24e2a639 100644
--- a/3d-viewer/3d_cache/sg/sg_node.cpp
+++ b/3d-viewer/3d_cache/sg/sg_node.cpp
@@ -166,8 +166,10 @@ void SGNODE::delNodeRef( SGNODE* aNode )
         return;
     }
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] delNodeRef() did not find its target\n";
+    #endif
 
     return;
 }
@@ -177,15 +179,21 @@ void SGNODE::AssociateWrapper( SGNODE** aWrapperRef )
 {
     if( NULL == aWrapperRef )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL handle\n";
+        #endif
+
         return;
     }
 
     if( *aWrapperRef != this )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] handle value does not match this object's pointer\n";
+        #endif
+
         return;
     }
 
@@ -194,8 +202,11 @@ void SGNODE::AssociateWrapper( SGNODE** aWrapperRef )
     if( m_Association )
     {
         *m_Association = NULL;
+
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [WARNING] association being broken with previous wrapper\n";
+        #endif
     }
 
     m_Association = aWrapperRef;
@@ -210,13 +221,17 @@ void SGNODE::DisassociateWrapper( SGNODE** aWrapperRef )
 
     if( !aWrapperRef )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] invalid handle value aWrapperRef\n";
+        #endif
+
         return;
     }
 
     if( *aWrapperRef != *m_Association || aWrapperRef != m_Association )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] *aWrapperRef (" << *aWrapperRef;
         std::cerr << ") does not match *m_Association (" << *m_Association << ") in type ";
@@ -224,6 +239,8 @@ void SGNODE::DisassociateWrapper( SGNODE** aWrapperRef )
         std::cerr << " * [INFO] OR aWrapperRef(" << aWrapperRef << ") != m_Association(";
         std::cerr << m_Association << ")\n";
         std::cerr << " * [INFO] node name: " << GetName() << "\n";
+        #endif
+
         return;
     }
 
@@ -248,6 +265,7 @@ bool S3D::GetMatIndex( MATLIST& aList, SGNODE* aNode, int& aIndex )
 
     if( NULL == aNode || S3D::SGTYPE_APPEARANCE != aNode->GetNodeType() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
 
         if( NULL == aNode )
@@ -259,6 +277,7 @@ bool S3D::GetMatIndex( MATLIST& aList, SGNODE* aNode, int& aIndex )
             std::cerr << " * [BUG] invalid node type (" << aNode->GetNodeType();
             std::cerr << "), expected " << S3D::SGTYPE_APPEARANCE << "\n";
         }
+        #endif
 
         return false;
     }
diff --git a/3d-viewer/3d_cache/sg/sg_normals.cpp b/3d-viewer/3d_cache/sg/sg_normals.cpp
index 3d028d70c3..7f94017430 100644
--- a/3d-viewer/3d_cache/sg/sg_normals.cpp
+++ b/3d-viewer/3d_cache/sg/sg_normals.cpp
@@ -100,32 +100,44 @@ SGNODE* SGNORMALS::FindNode(const char *aNodeName, const SGNODE *aCaller)
 
 void SGNORMALS::unlinkChildNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 void SGNORMALS::unlinkRefNode( const SGNODE* aCaller )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unexpected code branch; node should have no children or refs\n";
+    #endif
+
     return;
 }
 
 
 bool SGNORMALS::AddRefNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
 
 bool SGNORMALS::AddChildNode( SGNODE* aNode )
 {
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] this node does not accept children or refs\n";
+    #endif
+
     return false;
 }
 
@@ -245,8 +257,11 @@ bool SGNORMALS::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -260,15 +275,21 @@ bool SGNORMALS::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -290,8 +311,11 @@ bool SGNORMALS::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 {
     if( !norms.empty() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
diff --git a/3d-viewer/3d_cache/sg/sg_shape.cpp b/3d-viewer/3d_cache/sg/sg_shape.cpp
index 0d5587e902..ed92ccbb3f 100644
--- a/3d-viewer/3d_cache/sg/sg_shape.cpp
+++ b/3d-viewer/3d_cache/sg/sg_shape.cpp
@@ -196,8 +196,10 @@ void SGSHAPE::unlinkNode( const SGNODE* aNode, bool isChild )
         }
     }
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] unlinkNode() did not find its target\n";
+    #endif
 
     return;
 }
@@ -221,8 +223,11 @@ bool SGSHAPE::addNode( SGNODE* aNode, bool isChild )
 {
     if( NULL == aNode )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] NULL pointer passed for aNode\n";
+        #endif
+
         return false;
     }
 
@@ -232,8 +237,11 @@ bool SGSHAPE::addNode( SGNODE* aNode, bool isChild )
         {
             if( aNode != m_Appearance && aNode != m_RAppearance )
             {
+                #ifdef DEBUG
                 std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                 std::cerr << " * [BUG] assigning multiple Appearance nodes\n";
+                #endif
+
                 return false;
             }
 
@@ -260,8 +268,11 @@ bool SGSHAPE::addNode( SGNODE* aNode, bool isChild )
         {
             if( aNode != m_FaceSet && aNode != m_RFaceSet )
             {
+                #ifdef DEBUG
                 std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                 std::cerr << " * [BUG] assigning multiple FaceSet nodes\n";
+                #endif
+
                 return false;
             }
 
@@ -282,9 +293,12 @@ bool SGSHAPE::addNode( SGNODE* aNode, bool isChild )
         return true;
     }
 
+    #ifdef DEBUG
     std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
     std::cerr << " * [BUG] object '" << aNode->GetName();
     std::cerr << "' is not a valid type for this object (" << aNode->GetNodeType() << ")\n";
+    #endif
+
     return false;
 }
 
@@ -373,8 +387,11 @@ bool SGSHAPE::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
     {
         if( NULL == m_Parent )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [BUG] corrupt data; m_aParent is NULL\n";
+            #endif
+
             return false;
         }
 
@@ -388,15 +405,21 @@ bool SGSHAPE::WriteCache( std::ofstream& aFile, SGNODE* parentNode )
 
     if( parentNode != m_Parent )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] corrupt data; parentNode != m_aParent\n";
+        #endif
+
         return false;
     }
 
     if( !aFile.good() )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] bad stream\n";
+        #endif
+
         return false;
     }
 
@@ -450,8 +473,11 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 {
     if( m_Appearance || m_RAppearance || m_FaceSet || m_RFaceSet )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [BUG] non-empty node\n";
+        #endif
+
         return false;
     }
 
@@ -463,9 +489,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
     if( ( items[0] && items[1] ) || ( items[2] && items[3] ) )
     {
+        #ifdef DEBUG
         std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
         std::cerr << " * [INFO] corrupt data; multiple item definitions at position ";
         std::cerr << aFile.tellg() << "\n";
+        #endif
+
         return false;
     }
 
@@ -475,9 +504,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_APPEARANCE != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child apperance tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -486,9 +518,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !m_Appearance->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading appearance '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -497,9 +532,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_APPEARANCE != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref appearance tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -507,17 +545,23 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !np )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref appearance '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_APPEARANCE != np->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not SGAPPEARANCE '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
@@ -529,9 +573,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_FACESET != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad child face set tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -540,9 +587,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !m_FaceSet->ReadCache( aFile, this ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data while reading face set '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
     }
@@ -551,9 +601,12 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
     {
         if( S3D::SGTYPE_FACESET != S3D::ReadTag( aFile, name ) )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data; bad ref face set tag at position ";
             std::cerr << aFile.tellg() << "\n";
+            #endif
+
             return false;
         }
 
@@ -561,17 +614,23 @@ bool SGSHAPE::ReadCache( std::ifstream& aFile, SGNODE* parentNode )
 
         if( !np )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: cannot find ref face set '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }
 
         if( S3D::SGTYPE_FACESET != np->GetNodeType() )
         {
+            #ifdef DEBUG
             std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
             std::cerr << " * [INFO] corrupt data: type is not SGFACESET '";
             std::cerr << name << "'\n";
+            #endif
+
             return false;
         }