Library /sys$common/syshlp/nclhelp.hlb set, event_dispatcher, outbound_stream, Exception Messages  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 o  entity class not supported (OpenVMS)

    The Event Dispatcher is not registered with EMAA.  The NET$EVD
    process is probably not started.  For instructions on how to
    restart the Event Dispatcher, refer to
    HELP NETWORK_MANAGEMENT EVENT_DISPATCHER.