diff -r dea107dce0c4 -r 750eeb7230a1 controls/DebugVariablePanel/DebugVariableGraphicViewer.py
--- a/controls/DebugVariablePanel/DebugVariableGraphicViewer.py	Mon Aug 14 21:31:01 2017 +0300
+++ b/controls/DebugVariablePanel/DebugVariableGraphicViewer.py	Mon Aug 14 22:23:17 2017 +0300
@@ -163,7 +163,7 @@
             if not isinstance(values, TupleType):
                 raise ValueError
         except:
-            message = _("Invalid value \"%s\" for debug variable")%data
+            message = _("Invalid value \"%s\" for debug variable") % data
             values = None
 
         # Display message if data is invalid