I'm not actually sure that this pops up when item management is happening, but it gets stuck on "loading shop..." and this window pops up:
Traceback (most recent call last):
File "wx/_core.pyc", line 14669, in <lambda>
File "Programs/1001/Abrosia.py.nc", line 289, in LogEvent
File "wx/_core.pyc", line 14619, in __getattr__
PyDeadObjectError: The C++ part of the ProgramFrame object has been deleted, attribute access no longer allowed.