Error 400: Form already displayed; can't show modally

This error is seen after some other error has already caused the program to crash. It means the form you see on the screen belongs to a program which is no longer running.

Close the form. Ignore this error. The error that occurred immediately before this is the one that needs to be resolved.

How did we do?

Error 381: Invalid property array index

Error 429 when Printing Form