Opening User Created Toolbox Crashes ArMap 10.1

Discussion created by kreuzrsk on Mar 21, 2013
Latest reply on Mar 23, 2013 by Hornbydd
Do ToolBoxes go bad?  I have some toolboxes created at 10.0 that when I try to open crash ArcMap/ArcCatalog 10.1.  At first I thought it was happening just with 10.0 toolboxes but now some of my 10.1 toolboxes crash AM/AC.  All of this toolboxes contain python scripts and just one script per toolbox.  Everything was working last week.