1-create a main form: as top level, show in taskbar, MDI
2-create a child form: MDI, in top level,maximized
3-create a modal child form: MDI, in top level,maximized
4-call child form from main form
5-call modal child form from child form's init section
6-close modal child form
7-you will see vfp's crash

if anyone interest it, I can send my sample...