1 files changed, 9 insertions, 2 deletions
diff --git a/src/main/python/utils/undo.py b/src/main/python/utils/undo.py
index 2f28964..8e21fe7 100644
--- a/src/main/python/utils/undo.py
+++ b/src/main/python/utils/undo.py
@@ -83,8 +83,15 @@ class deleteCommand(QUndoCommand):
         return startIndex,endIndex
     
     def reconnectLines(self):
-        self.startGrip.lineGripItems[self.indexLGS].lines.append(self.diagramItem)
-        self.endGrip.lineGripItems[self.indexLGE].lines.append(self.diagramItem)
+        try:
+            self.startGrip.lineGripItems[self.indexLGS].lines.append(self.diagramItem)
+        except:
+            pass
+        try:
+            self.endGrip.lineGripItems[self.indexLGE].lines.append(self.diagramItem)
+        except:
+            pass
+        
 class moveCommand(QUndoCommand):
     """
     QUndoCommand for move item event