diff -r e40f3914e55f -r f1f10ceb9341 etherlab/ConfigEditor.py
--- a/etherlab/ConfigEditor.py	Fri Sep 28 19:30:16 2018 +0300
+++ b/etherlab/ConfigEditor.py	Sat Sep 29 12:48:28 2018 +0300
@@ -777,6 +777,7 @@
         setattr(self.ProcessVariablesGrid, "_MoveRow", _MoveVariablesElement)
 
         _refresh_buttons = getattr(self.ProcessVariablesGrid, "RefreshButtons")
+
         def _RefreshButtons():
             if self.NodesFilter.GetSelection() == 0:
                 _refresh_buttons()