he script pfeAddin_OnStart.py runs on the Excel main thread every time the
PFE add-in loads into an Excel application. This happens when the Excel
application is started or if the PFE add-in is loaded. The repeated execution
of this script in the same namespace will lead to errors.
The script pfeAddin_OnStart.py executes the script PythonForExcel.py.
Both pfeAddin_OnStart.py and PythonForExcel are located in the "c:\Program