>>2. Why does this happen only when Page 4 is access by the user?
>Is combobox on the 4th page? Or the form itself?
>
The combobox is on the form. The InterActivechange executes select statements to populate grids and other controls in the pageframe. Page4 has the basegrid.

>>3. Why isn't the cmdReturn button which is part of my baseform releasing the form (actually does nothing).
>
>After the error in Destroy method it doesn't correctly work and release this form.

But, this does not happen with the 2nd cmdReturn I placed on the form.

Thanks Nadya.