Make sure to NEVER edit the same form in two separate instances of VFP!

>Hi All:
>
>I often get this error when working on updating a form with
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>MODIFY FORM blarg
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>When I try to save the changes, I get this message:
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>memo file blarg.sct is missing or is invalid
>

>
>I then click ok and try to save and x-out again. I then get a message that VFP has stopped running. Once I click 'Close program', VFP disappears.
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>I then go back into VFP. The form seems OK and includes all the latest updates. The only problem is that all the saved code from the Command Window has disappeared!
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>Any thoughts?
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>Thanks,
>
>Yossi