diff -r b6894285d4cc -r 5e6d0969bb5d editors/Viewer.py
--- a/editors/Viewer.py	Thu Jun 06 17:03:19 2013 +0200
+++ b/editors/Viewer.py	Thu Jun 06 23:01:15 2013 +0200
@@ -271,6 +271,7 @@
                         self.ParentWindow.RefreshScrollBars()
                         self.ParentWindow.RefreshVisibleElements()
                         self.ParentWindow.RefreshVariablePanel()
+                        self.ParentWindow.ParentWindow.RefreshPouInstanceVariablesPanel()
                         self.ParentWindow.Refresh(False)
             elif values[1] == "location":
                 if pou_type == "program":
@@ -318,6 +319,7 @@
                     if not var_name.upper() in [name.upper() for name in self.ParentWindow.Controler.GetEditedElementVariables(tagname, self.ParentWindow.Debug)]:
                         self.ParentWindow.Controler.AddEditedElementPouExternalVar(tagname, values[2], var_name)
                         self.ParentWindow.RefreshVariablePanel()
+                        self.ParentWindow.ParentWindow.RefreshPouInstanceVariablesPanel()
                     self.ParentWindow.AddVariableBlock(x, y, scaling, INPUT, var_name, values[2])
             elif values[1] == "Constant":
                 self.ParentWindow.AddVariableBlock(x, y, scaling, INPUT, values[0], None)