Hi Alan,

>In my application, I display a group of command buttons on 1 page of a pageframe. The button named "new", when clicked, opens the various files needed to continue processing, and a "do form ptdata" command is issued. The form "ptdata' is a formset with 7 forms. When the do form command is issued, I receive the "data type mismatch" error message. I then press OK and all processing continues without a problem.

In your Error method of your FormSet, popup a wait window with the lineno and method. I'm fairly sure that it is some Init() code not working right. If you find the line and still can't figure out why the Data is mismatched, post the whole method here, and I might be able to help