I am loading, doing some changes, and saving a Sales Order. I do this on approve and everything works. I do this on edit (when the status is changed to Pending Approval) and it throws the above error: "An error occurred while processing item options."
Now I have commented out the setting of 2 fields I was setting. It still throws the error.
The only thing that comes up in SuiteAnswers doesn't really make sense to this situation.
This ended up being caused by something else in my code that I didn't think mattered.
When status is changed to Pending Approval, I delete a record where there is a Custom field that references it on the SO line. I was deleting it, setting some values, and then saving the record. When i took the delete out, it worked. So I ended up pushing the id of the record to delete into an array and then looping over that AFTER I saved the record and it worked