Art, Try the following: 1. create the following command file and save it as 'xeqtell.cmd.sys' or whichever name you prefer. setjcw cierror=0 tell !hpjobname,!hpuser.!hpaccount Hi 2. On your 'logon' udc do the following ... if hpjobtype = "S" then xeqtell.cmd.sys > $null if cierror <> 1620 then echo **** echo Multiple logons are not allowed.. echo **** continue bye endif endif ... ... If you do not mind the display: "The sender is the only qualifying target. No message sent. (CIWARN 1620)" Then you can imbed the command file into the logon udc. Regards Paul H. Christidis ______________________________ Reply Separator _________________________________ Subject: Limiting User logon Author: Art Bahrs <[log in to unmask]> at CCGATE Date: 04/01/97 10:51 AM Hi all :) I can't remember if this one was covered the last time user logon limiting methodologies were covered... so sorry if I missed the answer. Using only MPE/iX 5.0 FOS can you restrict a user to only one logon at a time... ie so Joe.anyacct can only be logged on to one terminal/device at a time?? Thanks for any help Art Bahrs