> And just one more question, I have read in another mail something
> about FB local atachments are not threadsafe. In may case I have
> a client application running in the same PC as the server. This
> is a multithread application, and all threads use the same
> connection object. Could this be the origin of my problems?
>
> Thanks again,
>
> Trini.

If you are using TCP connection string
i.e. machine:drive:/path/file/gdb
then you are not connecting locally.