>I first encountered this bug way back in foxpro 2.6 report and now It happened to me in vfp3 and vfp5 forms.
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>Here it is: while running application you get some error, the last one I had it was ".SCT file is invalid" then the methods code got switched, what is in the Active method goes to Deactive method or any other method.
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>You will goe nut trying to figure out what the problem is and it is very bad when it happen in front of a user.
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>Does anyone encountered this???
>
>This one is very bad

I've seen this in 2.5/2.6. Similar to Edward's answer, I always would open up the screen/form in Screen Builder/Form Designer and generate code again. If I could get it to open I always restored from backup. Yes, is very bad one... always wished I knew why but afraid I dont.