RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 06/05/2014 08:03:41
RMAN-05501: aborting duplication of target database
RMAN-06136: ORACLE error from auxiliary database:
ORA-01503: CREATE CONTROLFILE failed
ORA-12720: operation requires database is in EXCLUSIVE mode
The above is due to cluster_database is set to true.
Please set the cluster_database to false and restart the restore.