Status 6 points to an issue with the the script.
Troubleshooting must start with checking the actual script and the script output.
From the Oracle RMAN logs - I can see this error:
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 :-- Oracle RMAN backup --------------
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 :-- Oracle instance ='FEPA':'/app/oracle/11.2.0/db_4' autostart='Y'
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 : Started RMAN for ORACLE_SID='FEPA'
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 : SBTPARMS=NB_ORA_SID=FEPA,NB_ORA_CLIENT=xxxxxxxxxxxx,NB_ORA_POLICY=xxxxxxxxxxxxxx
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 : /home/oracle/rman/rman_backup.sh backup_db_Hourly_archivelogs FEPA USECATALOG
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 :--- Ended RMAN with rc='126' for ORACLE_SID='FEPA'
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 : Netbackup policy 'xxxxxxxxxxxxxxxxxxxxxxxx' schedule 'HOURLY1' failed for 'FEPA'
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 : Check '2015-08-27-120624' rman logs file /data/ora/FEPA/admin/rman/logs
Aug 27 12:06:24 xxxxxxxxxxxx Netbackup HOURLY1 JobId=620855 :== FAILED Netbackup Job with rc='126' (started at 2015-08-27-120624)
