>Thank you for your prompt reply but, here, Rushmore is simply not the issue.
>
>No fields that would be involved with Rushmore optimization have been changed . Additionally the query itself is completely unchanged.
>
>Something else is going on to cause this for no obvious (to us) reason. Other ideas?

I don't use VFP9 (still with VFP7) but I heard something about grouping that could cause problems. Could it be your problem?