The Cluster Manager address space (ANTCLNNN) detected a condition that renders it unable to maintain a clustered session with the specified master session id and master high level qualifier
If sessions were previously coupled from this system while the cluster manager was active, the system will report a COUPLING_TIMEOUT condition for this cluster in the associated master session.
See "System data mover return and reason codes" for an explanation of the return and reason codes. Correct the error and issue command F ANTAS000,CREFRESH to reinitiate cluster setup processing.
Extended remote copy (XRC)