>Hi,
>
>I have a problem in a multiuser application installed in Windows NT, some times I have the following error message "Data acess is denied" and I do not have acess to the file again, the only way to resolve this problem is verify it´s attributes and save it again has a archive file. Why this happen ?
>
>
>Thanks

Have you checked the user permissions to access such files? It happened to me once, when the system administrator changed permissions.

Oscar