Hi, Orlando. Most of the time, when Proseries crashes during this task, I don't get any errors when it does so. It usually just closes itself in an instant. However, I've recorded the error boxes I have received. 

One error sometimes pops up that reads,

Error Report: 
Unexpected error occured, please restart ProSeries.
If you continue to encounter this error, please contact technical support for assistance.

In some cases, I receive two error prompts, one after the other, like this:

Codebase Error:
Error #: -920
Error #: 95910
Out of memory

Followed by,

Proseries-2019: protax19.exe-Fatal Application Exit:
EXITING APPLICATION

I've updated my program and it hasn't helped the situation. I've tried selecting multiple clients to delete but that doesn't help.