Device management status code 80
Explanation: The tpunmount command encountered an error while communicating with the NetBackup Job Manager. The details of this issue may be found in the Activity Monitor entry for this job.
Recommended Action:
Examine command output, debug logs, and system logs for a more detailed message on the error.
See "Setting Media Manager debug logging to a higher level" in the NetBackup Logging Reference Guide.
Verify that the NetBackup Job Manager is running on the master server.
Verify that the arguments that are provided to the tpunmount command are correct.