>Mark:
>
>Why do I get the following error message when I open a specific form. This is the same form that is having the Group By issues.
>
>

Data type is invalid for this property

>
>I just keep clicking OK, since I don;t know what it is referring to, and since I have never had that message show up in VFP6 or 7, and the code has run well todate.
>
>Thanks.

It sounds like you might have a custom property the same name as a VFP internal prperty name. Your datatype is different than the data type that VFP now expects that property to have.