Hi,
Try doing the following steps :
-- Go to Tools | Options | Catalog and Place a check mark on "Use Storage media-based Catalogs"
-- Close Backup Exec GUI and stop all Backup Exec services.
-- Rename Catalog directory to Catalogs.old
(default path C:\Program Files\VERITAS\Backup Exec\NT)
-- Restart all Backup Exec services
-- Run a catalog job on the tape.
Do let us know if the above helped you.
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Thanks.