>>>>>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.
>
>Sorry about that Jim, I misread your answer. The SQL in the RowSource is as follows:
>
>SELECT Buil, Buildesc FROM BUIL ;
>WHERE PB AND Proj=This.Parent.Parent.Column9.cboProj.Value ;
>INTO CURSOR cBuillist ORDER BY Buildesc

First, I agree with Edward Pickman and Jim Booth.

Still, I would like to know what's the real cause of the error. Because if the This.Parent.Parent.Column9.cboProj is correct, it should work.

Are you sure you need 2 Parent in the above reference? Isn't it This.Parent.Column9.cboProj ?

It's rather easy to get confused when you use references like this.

Vlad