1.  <install_path>\Veritas\NetBackup\bin\admincmd>nbrbutil -resetAll
2.  <install_path>\Veritas\NetBackup\bin\admincmd>nbemmcmd -deletealldevices -machinename <server_name> -machinetype media
3.  Reconfigure NBU devices as normal using the device configuration wizard.

But still the same error persists.

Kindly advice

Regards

Girish