FWIW, I got this error when trying to save a form I was working on in VFP9.
The form was pretty new, no code in it yet, just a lot of controls. I tried
to recover by creating a new form of the same class and copying and pasting
the controls onto the new form. It seemed to work at first, but on the
second attempt to save, I got "File is not open". I then pasted the controls
onto a new base class form and saved it. Then FoxPro crashed. On restart,
the second rescue form seems to be OK.
I don't know if this means anything to anyone, but I thought I'd mention it.
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