diff -r 278dc1144059 -r 0e41dbe6ddcd controls/DebugVariablePanel/DebugVariableTextViewer.py
--- a/controls/DebugVariablePanel/DebugVariableTextViewer.py	Fri Nov 04 22:11:55 2022 +0100
+++ b/controls/DebugVariablePanel/DebugVariableTextViewer.py	Fri Nov 04 22:14:14 2022 +0100
@@ -96,6 +96,7 @@
         # Display message if data is invalid
         if message is not None:
             wx.CallAfter(self.ShowMessage, message)
+            return False
 
         # Data contain a reference to a variable to debug
         elif values[1] == "debug":
@@ -118,6 +119,8 @@
                 self.ParentWindow.InsertValue(values[0],
                                               target_idx,
                                               force=True)
+            return True
+        return False
 
     def OnLeave(self):
         """