Apply service pack 3 if you haven't already.
Can you pinpoint the error to a specific line of code?

Here is a list of fixes in the SP3 http://msdn.microsoft.com/vstudio/sp/vfpfixes.asp

>My programs are working great, but after awhile of heavy adding and editing records, the program starts generating "datatype mismatch" or similar type messages that make me think that the public variables I setup in the beginning program, are no longer found. You can click on "ignore" and most times it will continue and work fine. If you exit the program and start it up again, all is well for awhile...
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>Are there some memory functions that I don't know about that I need to perform periodically to clean up memory? My DOS based programs in FoxPro 2.x never had this problem. This is new to me.
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>Any ideas what would be causing this?