look for error messages in log files inside /nsr/applogs, at the client side

No files is in the folder /nsr/applogs
Why file name nwora.res is not in the folder /nsr/res?
Thank

There is something incorrect in the nsrnmo script. Check for the PATH, ORACLE_SID etc. Also, the scheduled backup script should have the right username & password instead of only "/" in the script itself.

I already checked nsrnmo file and confirm it is correct.
I am thinking nsrnmo file did not read because no any error in /nsr/applogs.

Is nsrnmo in /usr/bin folder? If not, update the "Executable Path" in the client resource on the backup server.

Would suggest the following;

1. Ensure that the RMAN script is ok by executing it from the command line using the root os user. In many environments, the root user does not have the priveleges to logon to the oracle database. For the NMO to work properly, the root os user needs to be able to logon to the oracle database over TNS with database admin role.
2. Ensure that the permissions of the RMAN script is set to 700 with the owner as root.

I change from rman to RMAN in Backup Command.It can backup success

Thank for any suggestion.

I believe you are hitting known issue and there is a fix available from EMC. Check with your support.