Shouldn't make any difference as far as I'm aware, I always get that message, I think it's just advisory. Damon. Subject: Unable to start the Listserv Primary servic <SNIP> another 5 points I was still unable to start the service. I am now getting an error message that one of my lists is running with over 5000 subscribers, and that the High Performance version of Listserv would be recommended. Would it be possible that this is the reason why the service is unable to start.