The XCOUPLE_FAILED status for a session occurs when a coupled XRC session is not able to read or write to the master data set because of an error. XRC issues a message to indicate the particular error that occurred. All volumes in the session are suspended. The session remains coupled to the master session. For XRC sessions that are coupled through a cluster session, if one or more of these sessions encounters this type of error, the cluster session indicates to the master session that the cluster session is in a XCOUPLE_FAILED status.