EXPLANATION This message should occur only on a down-level computer. Any action to correct the problem should be performed ...

EXPLANATION    This message should occur only on a down-level computer. Any action to correct the problem should be performed on that computer.  The server is supporting the maximum number of sessions.    ACTION    Try the command later. You will not be able to start a session with this server until another user's session has ended.    Also, see your network administrator. Your administrator may want to purchase an Additional User Pak for the server or increase the value of the MAXUSERS entry of the server's configuration file.