Library /sys$common/syshlp/sda.hlb SET, OUTPUT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 	SET OUTPUT [file-spec]

     Sends all subsequent output to the specified file.  None of the
     subsequent output is sent to SYS$OUTPUT.  This remains in effect
     until you issue another SET OUTPUT command.  To redirect output
     to your terminal, issue a SET OUTPUT command specifying SYS$OUTPUT
     as the file-spec.

     The default file specification is SYS$DISK:[default-dir]SYSDUMP.LIS.