o  connection failed

    The connection attempt failed. The exception may include
    additional arguments that give more information about the
    failure.

    Arguments:

    reason      The connection failed at the Session Control layer.

    data        This field can include optional data that describes
                the reason the connection attempt failed.

 o  no sink specified

    All of the sink specifier attributes are null.

 o  wrong state

    The operation failed because the entity was not in off,
    onconnecting, or ondisconnecting state.

 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.