>>Sergey - This.nRecNo = Recno(This.RecordSource) is in the Init event of the grid and the record source is 1-Alias. I'm stumped!
>
>Put SUSPEND just before IF statement and check values in the debuger.

Sergey - I'm embarrassed to tell you the problem. If forgot to add my code the the appropriate line indicating a record change. I looked that that code 50 times but never spotted it. Oh well.
Thanks again for all your time and help.