I have a problem wit the Python Addin (10.1). I have followed the link (the python addin instruction) to create a button to execute the python code I want. I can see my addin application in the Add-in Manager in ArcMap. However, the toolbar can not be activated and the icon is missing. I have browsed the ESRI forum (python) first to look for the resource. A post mentioned the python window in ArcMap can automatically shows the error. However, the window does not point any error. My computer is 64 bit computer ( hopefully this is not the problem). I wonder if you all could give me some suggestions.