If a CUP issues the acceptNotification or acceptNotificationChained method and is placed in unidirectional server message reception wait status, and then receives a cancellation message from another CUP, the unidirectional message reception wait status is released. You can send a cancellation message by issuing the cancelNotification method. The following figure shows the flow of releasing the unidirectional message reception wait status.

Figure 2-24 Flow of releasing unidirectional message reception wait status