>>>There is no code is Requery()
>>Colin,
>>
>>What is the rowsource for the combo? Is that causing the error?
>
>Hi Jim,
>
>The rowsource is an SQL-SELECT which works fine. I know this because the combobox works fine and I have been able to requery it from other objects on the form, just not the grids AfterRowColChange.
Colin,

I understand the issue, I was trying to see if the SELECT has any reference to Parent in it. It may a bug that VFP is confused and thinks the current control is the grid when the select is running and it is looking at the wrong Parent property.