Backup Exec 15 : Catalog a OST device error e0000900

I am currently using Backup Exec 15 FP4 and OST for the backup. Now I want to connect the OST to a backup server (BE15 FP4) in DR site. The inventory job is successfuly, but the catalog job failed with the below error.

Error:e0000900 - The requested media is not listed in the media index and could not be mounted. To add the media's catalog information to the disk-based catalogs, run an inventory operation on the media and resubmit the Catalog operation.
For additional information regarding this error refer to link V-79-57344-2304