I have written many Python scripts using ArcPy in ArcGIS 10, and so far my only means of debugging is restricted to printing messages to the geoprocessing results window using arcpy.AddMessage(). ...
It was a toss of a coin whether this question is a GIS.SE or StackOverflow question... I'm going with GIS.SE because the problem seems to lie with ArcCatalog. I have several addins that have been ...