It could be caused by corrupted tables/indexes.

>One of my clients it's getting this error from 2 .exe files:
>(med2000.exe is one of the files)
>
>
>An error has occurred in your program. To keep working anyway, click Ignore and save your work in a new file. To quit this program, click Close. Your will lose your information you entered since your last save.
>
>
>I used to see this kind of error on Foxpro 2.6, and if I remember it was caused by .esl corrupted file.
>
>Has anybody faced this error before?
>
>TIA