>>Which version of FoxPro you're using? I remember something like that in FPD2.6
>>
>>VFP6.0 SP3
>
>Hmmm. Never seen this error here. May be I was being lucky :)

Never say never! I was trying to do something and got: "Attempting to lock. Click ESC to Cancel" Wait window. I hit ESC, but it showed it again and again with Error "Revert"... Anyway, I reverted it and closed. It's a bug in our main application...