>But I'm just tired. I don't use a private datasession with this application, so I didn't try your suggested code. Also I stopped all timers with no success... I know there's something wrong, because I use this code my other applications without generate any error (My other applications use private data sessions, I don't know if this's about using private data session)...
>
>This's a simple code, there's no any technical issue like using activex, web service or anything, just pure VFP code. I usually solve VFP code problems with myself. :(

So, if you are not using private data sessions, what about other forms / programs that you might have running on the background, did you check those to be sure not one has a timer and opening the table? But as Lutz suggested a break-point in used(alias) should help you.