Is your form playing with SET PATH?

>Problem:
>
>Run myapp.exe.
>
>It displays my windows system menu bar (do menu mymenu.mpr), and a startup form (do form mystartupform.scx) then issues a read event.
>
>Open a form from the menu (someform.scx).
>Close the form.
>Open someform.scx from the menu again.
>
>I get the error message "File "someform.scx" does not exist"
>
>Any clues as to what is going on ???