Media Manager status code 138
Message: media generation rule already exists
Explanation: You or a NetBackup media management interface attempted to add a MEDIA_ID_BARCODE_CHARS rule that already exists. The same rule cannot be added twice.
Recommended Action: Examine the listing of the MEDIA_ID_BARCODE_CHARS rules again.
The description of the MEDIA_ID_BARCODE_CHARS rules is available at the following location:
See "About the vm.conf configuration file" in the NetBackup Administrator's Guide, Volume II.