In Backup Exec 2012, when attempting to manually deleting backup sets, a pop up error occurs: "Unable to delete the 0. Unknown reason 0."
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2012 Rev 1798 Service Pack 4 (TECH212772).