You may also check SP1 Readme for some additional enhancements to SET TABLEVALIDATE command.

>Wonderful! Told you I was no expert. :)
>
>>Carole,
>>
>>There's no need for VFP7. See INFO: Data Reliability Enhancements in Visual FoxPro 8.0 mskb #814131.
>>
>>
>>
>>>Hi,
>>>
>>>I am by no means an expert on this subject, but it has happened to me as well a couple of times since I started using VFP8. I THINK the trouble is that the table header is out of sync with the data. What seems to work for me is to open the data up in version 7, I get no complaints from 7 usually. Add a bogus record which rewrites the header. Close 7, and reopen it in 8 and things are happy again. Then go back in and get rid of the bogus record.