Invoice Workbench: Exact Fetch Returns more than request number of rows - need sql trace

Hello,  in 12.1.3, whenever we enter an invoice and click on the lines, we get the exact fetch error.  The form does not show me the sql that was running at the time, which I need to determine the cause.

I've done a trace with binds and waits and I see many queries but the trace file does not show any errors.   I've done an FRD trace and the frd just repeats the error that I see in the form, but it does not tell me which query caused the error.

I am at a loss for how to obtain the query that is causing this.