DNZEAP413E: No event sender is selected.

Explanation: When Custom is selected for Event Sender, at least one event sender must be selected.

Operator Response: Specify at least one event sender that you want to include in the filter. To specify an event sender, either select a sender from the System list or type an entry in the Additional sender field, then click Add to add the selection to the list of selected senders. Otherwise, select Default for Event sender to include.