/sys$common/syshlp/NCPHELP.HLB

 Specifies the command file containing the command  procedure  used  to
 start the indicated object.  If not specified, the default is

     SYS$SYSTEM:object-name.COM

 For VAX PSI, this parameter  specifies the command file containing the
 command procedure used to activate a user program or  task.  When  you
 specify an object for the first time, this parameter is mandatory.