prompted for an undefined field

[dino624]

I am being prompted for a field that I can not find on the form or in code. I did change the form to access a linked table from an AS/400 but that field is not included in the record.
How do I determine where this field is coming from and why am I being prompted for it.. I even searched the entire project to find the field but could not.

[June7]

It is referenced somewhere. Maybe an expression in query that is the form RecordSource. This sort of search can be frustrating. That's why I have Rick Fisher's Find and Replace for Access, cost about $50. Saved my sanity more than once.