ORA-27206: requested file not found in media management catalog

During take backup of Oracle Database through Veritas netbackup, appears below errors:

RMAN-03009: failure of backup command on chan05 channel at 02/08/2020 05:24:23
ORA-19513: failed to identify sequential file
ORA-27206: requested file not found in media management catalog

Solution:

The problem may occurred If you are added your client ip address in master netbackup server while configuring backup policy.

So change client hostname with domain name instead of ip address of client.