>This is part of an application which utilizes a parent to child to multi-child relationship...there are other child views which are refreshed on other pages. Speed has not been an issue since VFP 5. I seem to have made the problem go away by re-entering the Control Source on 2 columns of the Grid (which are Defined Functions)...Why it now works, I haven't a clue.

Well, as you know, and specially when programming, if it ain't broken, don't fix it :-)