Opening an excel file manually allows formulas to run, opening an excel file with VBScript or PowerShell or Python's win32com doesn't

Question

I\'m having a problem with a script not updating an excel file, and I reduced it to the following problem:

If I open an excel file, I can go to the Formulas tab and

Answer 1

I found the problem, opening excel pages with VBScript (or Powershell) doesn't automatically include the Addins that are included when opening manually, so I needed to manually add these two addins.

excel.AddIns.Add("C:\Program Files (x86)\PIPC\Excel\PITrendXL.xla").Installed = True
excel.AddIns.Add("C:\Program Files (x86)\PIPC\Excel\pipc32.xll").Installed = True