diff --git a/cvpcb/cvpcb_mainframe.cpp b/cvpcb/cvpcb_mainframe.cpp
index e1f1961443..d94cc4aa80 100644
--- a/cvpcb/cvpcb_mainframe.cpp
+++ b/cvpcb/cvpcb_mainframe.cpp
@@ -59,7 +59,6 @@
 
 #define CVPCB_MAINFRAME_NAME wxT( "CvpcbFrame" )
 
-
 CVPCB_MAINFRAME::CVPCB_MAINFRAME( KIWAY* aKiway, wxWindow* aParent ) :
     KIWAY_PLAYER( aKiway, aParent, FRAME_CVPCB, _( "Assign Footprints" ), wxDefaultPosition,
                   wxDefaultSize, KICAD_DEFAULT_DRAWFRAME_STYLE, CVPCB_MAINFRAME_NAME )
@@ -69,6 +68,7 @@ CVPCB_MAINFRAME::CVPCB_MAINFRAME( KIWAY* aKiway, wxWindow* aParent ) :
     m_librariesListBox    = nullptr;
     m_mainToolBar         = nullptr;
     m_modified            = false;
+    m_cannotClose         = false;
     m_skipComponentSelect = false;
     m_filteringOptions    = FOOTPRINTS_LISTBOX::UNFILTERED_FP_LIST;
     m_tcFilterString      = nullptr;
@@ -394,6 +394,9 @@ bool CVPCB_MAINFRAME::canCloseWindow( wxCloseEvent& aEvent )
         }
     }
 
+    if( m_cannotClose )
+        return false;
+
     return true;
 }
 
@@ -1127,7 +1130,11 @@ 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 466436aaaf..b2871b26b0 100644
--- a/cvpcb/cvpcb_mainframe.h
+++ b/cvpcb/cvpcb_mainframe.h
@@ -367,15 +367,16 @@ private:
     void refreshAfterSymbolSearch( COMPONENT* aSymbol );
 
 public:
-    FOOTPRINT_LIST*           m_FootprintsList;
+    FOOTPRINT_LIST* m_FootprintsList;
 
 protected:
-    bool                      m_modified;
-    bool                      m_skipComponentSelect;   // skip component selection event during
-                                                       // automatic selection/deletion of
-                                                       // associations
+    bool            m_modified;
+    bool            m_skipComponentSelect;  // skip component selection event during
+                                            // automatic selection/deletion of associations
 
-    bool                      m_initialized;
+    bool            m_initialized;          // true after creating widgets.
+    bool            m_cannotClose;          // true when the cvpcb frame cannot be closed
+                                            // (mainly during reading a netlist sent by Eeschema)
 
 private:
     friend struct CV::IFACE;