o  illegal element

    The command did not include a class or instance argument, or
    an argument contained one of the following illegal elements:
    wildcard, node name, node class, illegal class.

 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.

 o  no such object instance

    The specified event dispatcher sink instance does not exist.