--- frmQuery.cpp	2012-11-08 23:22:01.000000000 +0800
+++ frmQuery.cpp	2013-06-07 15:39:14.453599679 +0800
@@ -1451,7 +1451,7 @@ 
 
 	if (allowUpdateModelSize)
 	{
-		canSaveGQB = controller->getView()->canSaveAsImage();
+		canSaveGQB = controller->getView() != NULL && controller->getView()->canSaveAsImage();
 	}
 
 	toolBar->EnableTool(MNU_UNDO, canUndo);