ORA-27206: requested file not found in media management catalog
During take backup through Veritas netbackup, it shows below errors
channel ch00: starting piece 1 at 2011-10-31:10:13:48 RMAN-03009: failure of backup command on ch01 channel at 10/31/2011 10:14:23 ORA-19513: failed to identify sequential file ORA-27206: requested file not found in media management catalog
The problem has occurred If you are added your client ip address in master netbackup server while configure backup policy.
So change client hostname with domain name instead of ip address of client.