/CLI=cli-filespec
       /NOCLI

    Specifies the name of a command language interpreter (CLI) to be
    used by the subprocess. The default CLI is the same as the
    parent process (defined in SYSUAF). If you specify the /CLI qualifier,
    the attributes of the parent process are copied to the
    subprocess.

    The CLI you specify must be located in SYS$SYSTEM and have the
    file type EXE.