If the subject error occurs and the WFW File Manager issues An internal Lanman error has occurred, there may be a corrupt share on the Windows NT computer.
Try any or all of the following:
1. Disconnect all shares to Windows NT, including hidden ones, and reestablish them.
2. If your share names exceed 12 characters, shorten them.
3. As a last resort, delete all shares on the Windows NT computer and reestablish them.