On one of the forms in my project, I have a command button that starts another form and then sets the first form's visibility to .F. Then on the second form's release, I reset the first form's visibility to .T.

first form (splash) command button - Do Form about
ThisForm.Visible = .F.
second form (about) release - splash.visible = .T.

This much works fine. But then I have a command button that starts the main form and releases the splash form

Do main
ThisForm.Release

Still, everything is fine but when I do the same thing on the main form as on the splash form (start a new form and set the visibility to .F.) and then try to come back to the main form, I get the error message "object MAIN not found. Why does this not work here like it does on the splash form and how can I make it work?