If your Novell 16bit Netx client attemps to logon to a Windows NT Server running FPNW, you may receive:

                                 SERVER/USERNAME: Attempt to log on during an unauthorized time period. The                                 Supervisor has limited the time that you can log on to this server. You are                                 attached to server SERVERNAME.
This message can be caused by not having enough licenses configured.

If you are configured with Per Server licenses and have enough to switch to Per Seat, I recommend doing so.

See tip 127.