If you attempt to execute an ESP (extended stored procedure), you may see the following error:
00:00000:00008:1997/09/10 12:52:53.03 kernel XP Server failed to start. Try bringing up XP Server manually. Check SQL Server documentation for more information on how to bring XP Server up.
XP Server could not start because the port number is in use by another process. Use the procedures described in the previous section to determine if the port number specified for XP Server is in use.
If you find no processes using the same port number:
Restart Adaptive Server.
Execute the ESP that you attempted earlier.
XP Server should start automatically.