Is anybody know what the reason of that error might be?
'Releasing channel' error ocured during any operation.
Thanks.

RMAN-06005: connected to target database: QA (DBID=3127721917)
RMAN-06009: using target database controlfile instead of recovery catalog

RMAN> run {
2> allocate channel c1 type disk;
copy datafile 3 to '/home/oracle/temp/temp01.dbf.copy';
3> 4> }

RMAN-03022: compiling command: allocate
RMAN-03023: executing command: allocate
RMAN-08030: allocated channel: c1
RMAN-08500: channel c1: sid=8 devtype=DISK

RMAN-03022: compiling command: copy
RMAN-03023: executing command: copy
RMAN-03026: error recovery releasing channel resources
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-07005: error during channel cleanup
RMAN-07004: unhandled exception during command execution on channel default
RMAN-10032: unhandled exception during execution of job step 1:
RMAN-10031: ORA-65535 occurred during call to DBMS_BACKUP_RESTORE.DEVICESTATUS
RMAN-03006: non-retryable error occurred during execution of command: copy
RMAN-07004: unhandled exception during command execution on channel c1
RMAN-10032: unhandled exception during execution of job step 1:
RMAN-10031: ORA-65535 occurred during call to DBMS_BACKUP_RESTORE.COPYDATAFILE