Thanks!
I tried various combos of creation & editing settings with Prospect BO & could not find a combo that would not cause the error.
Testing other BOs in same BSV:
1- I get the same error on Recruiter BO using a query by form. In this case the Maint form is the only form so it is used for both creation & editing.
2- I do NOT get the error on RecruitingSchool BO using query by form where form is used for both creation & editing.
Very strange indeed. I can't seem to find the "magic combination".
Any other suggestions / tests you would like me to perform?
Tom