>Alessio,
>Which network are you using? May be a case that somebody is not closing the appication properly or the workstation is hanging and files are still open. If you are using Novell, check on the server for such case. I had this problem couple of times and after *killing* the user from the server, files were released.
>Yashodhan.

I'm in a simple Windows network
Yesterday I had a crash in my application receiving the error message telling me that could not write the file.
Anyway my pc was turned off.