diff --git a/eeschema/dialogs/dialog_sim_settings.cpp b/eeschema/dialogs/dialog_sim_settings.cpp
index 78bafc0fa1..ccdc3510f2 100644
--- a/eeschema/dialogs/dialog_sim_settings.cpp
+++ b/eeschema/dialogs/dialog_sim_settings.cpp
@@ -130,6 +130,15 @@ bool DIALOG_SIM_SETTINGS::TransferDataFromWindow()
                 DisplayError( this, e.what() );
                 return false;
             }
+            catch( const KI_PARAM_ERROR& e )
+            {
+                DisplayError( this, e.What() );
+                return false;
+            }
+            catch( ... )
+            {
+                return false;
+            }
         }
 
         if( m_dcEnable2->IsChecked() )
@@ -145,6 +154,9 @@ bool DIALOG_SIM_SETTINGS::TransferDataFromWindow()
             if( !m_dcStart2->Validate() || !m_dcStop2->Validate() || !m_dcIncr2->Validate() )
                 return false;
 
+            if( m_dcStart2->IsEmpty() || m_dcStop2->IsEmpty() || m_dcIncr2->IsEmpty() )
+                return false;
+
             try
             {
                 wxString dcSource = m_exporter->GetSpiceDevice( m_dcSource2->GetValue() );
@@ -160,6 +172,16 @@ bool DIALOG_SIM_SETTINGS::TransferDataFromWindow()
                 DisplayError( this, e.what() );
                 return false;
             }
+            catch( const KI_PARAM_ERROR& e )
+            {
+                DisplayError( this, e.What() );
+                return false;
+            }
+            catch( ... )
+            {
+                return false;
+            }
+
         }
 
         m_simCommand = simCmd;