How to solve ORA-17628: Oracle error 19505 returned by remote Oracle server during clone from active database

After some time, my RMAN "duplicate from active database" script threw the error below:

RMAN-03009: failure of backup command on c1 channel at 07/21/2015 12:13:15
ORA-17627: ORA-12577: Message 12577 not found;  product=RDBMS; facility=ORA
RMAN-12019: continuing other job steps, job failed will not be re-run

When I checked the alert log, it was clear

IBM AIX RISC System/6000 Error: 28: No space left on device

Solution: obvious.