/sys$common/syshlp/helplib.hlb RPCGEN, Qualifiers, /ERRLOG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Optional.
    DIGITAL UNIX equivalent: -L
    Default: Logging to stderr.

    Specifies that servers should log errors to the operator console
    instead of using fprintf with stderr. You must install servers
    with OPER privileges in order to use this feature.