Successful RunPython call returns empty error message

[lunacek]

OS (e.g. Windows 10 or macOS Sierra)

Windows 10

Versions of xlwings, Excel and Python

xlwings 0.15.1, Office 2010, Python 3.7

Describe your issue (incl. Traceback!)

I have dozens of xlwings scripts that work well and do what are they supposed to do, but after installing openai library all Runpython calls return empty error message ...

When I run the same code through mock caller, it returns no error in interpreter.

Your traceback here

#### Include a minimal code sample to reproduce the issue (and attach a sample workbook if required!)

```python
# Your code here
# any script called from inside Excel will do this

[fzumstein]

I am pretty sure this has been solved in the latest version of xlwings, you're on a very old release.

[lunacek]

I just upgraded to the latest version (0.29.1) and used fresh quickstart_standalone.xlsm the behavior is the same ... it is most likely not an issue of xlwings, but some other recently updated library, though I would like to get some pointers on where to look for the culprit.

[fzumstein]

This is what's probably happening: the shell call returns with an error code, but nothing is written to the log file:

https://github.com/xlwings/xlwings/blob/main/xlwings/addin/Main.bas#L275-L286