o  change filter

    Generated each time that the filter for a sink is changed,
    whether it is changed by a block, ignore, or pass command
    or by using set to change the value of the catch all filter
    characteristic. The intitial values of the filters for a sink
    may be reported as arguments in the enable sink event. A filter
    change event is filtered according to its new values.

    Arguments: (OpenVMS)

    new catch   Current catch all filter setting.
    all filter

    new global  Current global filter setting.
    filter

    new         Current specific filter setting.
    specific
    filter

    old catch   Previous catch all filter setting.
    all filter

    old global  Previous global filter setting.
    filter

    old         Previous specific filter setting.
    specific
    filter

 o  events lost

    Generated whenever the sink cannot allocate resources for event
    transmission. The event-logging function guarantees that this
    event cannot be lost. Also, you cannot block this event unless
    all events for all modules are blocked.

    This event is placed at the end of the queue. If another event
    cannot be queued because of resource limitations while this event
    is still the last event in the queue, the number argument is
    updated to reflect the latest total of lost events.   Argument:

    number      Number of consecutive events lost.