/FIXED_SERVER

   /FIXED_SERVER
   /NOFIXED_SERVER

   Specifies that the proxy server should fail to start if the
   server number specified by the /SERVER qualifier is not
   available. See /SERVER qualifier for more information about
   server numbers. This option is useful for starting standalone
   servers as detached processes. In this case, the proxy server has
   no method to return the selected server number. This option is
   ignored for managed proxy servers.

   The default is /NOFIXED_SERVER.