diff --git a/cvpcb/cvpcb_mainframe.cpp b/cvpcb/cvpcb_mainframe.cpp
index af735059b1..a5a9e8cd0a 100644
--- a/cvpcb/cvpcb_mainframe.cpp
+++ b/cvpcb/cvpcb_mainframe.cpp
@@ -125,6 +125,7 @@ CVPCB_MAINFRAME::CVPCB_MAINFRAME( KIWAY* aKiway, wxWindow* aParent ) :
     m_libListBox            = NULL;
     m_mainToolBar           = NULL;
     m_modified              = false;
+    m_cannotClose           = false;
     m_skipComponentSelect   = false;
     m_filteringOptions      = 0;
     m_tcFilterString        = NULL;
@@ -307,6 +308,10 @@ void CVPCB_MAINFRAME::OnCloseWindow( wxCloseEvent& Event )
     // clear highlight symbol in schematic:
     SendMessageToEESCHEMA( true );
 
+
+    if( m_cannotClose )
+        return;
+
     // Delete window
     Destroy();
 }
@@ -1117,7 +1122,11 @@ void CVPCB_MAINFRAME::KiwayMailIn( KIWAY_EXPRESS& mail )
     switch( mail.Command() )
     {
     case MAIL_EESCHEMA_NETLIST:
+        // Disable Close events during ReadNetListAndFpFiles() to avoid crash when updating
+        // widgets:
+        m_cannotClose = true;
         ReadNetListAndFpFiles( payload );
+        m_cannotClose = false;
         /* @todo
         Go into SCH_EDIT_FRAME::OnOpenCvpcb( wxCommandEvent& event ) and trim GNL_ALL down.
         */
diff --git a/cvpcb/cvpcb_mainframe.h b/cvpcb/cvpcb_mainframe.h
index 1cb86b28c6..04c46ce143 100644
--- a/cvpcb/cvpcb_mainframe.h
+++ b/cvpcb/cvpcb_mainframe.h
@@ -80,11 +80,13 @@ public:
 
 protected:
     bool            m_modified;
-    bool            m_skipComponentSelect;      // true to skip OnSelectComponent event
-                                                // (in automatic selection/deletion of associations)
+    bool            m_skipComponentSelect;  // true to skip OnSelectComponent event
+                                            // (in automatic selection/deletion of associations)
     PARAM_CFG_ARRAY m_projectFileParams;
 
     bool            m_initialized;
+    bool            m_cannotClose;          // true when the cvpcb frame cannot be closed
+                                            // (mainly during reading a netlist sent by Eeschema)
 
     CVPCB_MAINFRAME( KIWAY* aKiway, wxWindow* aParent );