V-79-57344-38397 Vmare Backups fail with Error 0xe00095fd - Backup Exec failed to get allocated blocks for the virtual disk.
ESX host is Vmware ESX 5.5.
Vmware ESX 5.5 is no longer supported with Backup Exec 21.x or 21.3.
Backup Exec version 20.6 (and above) will offer only minimal support for vCenter Server 5.5 and ESXi 5.5. https://www.veritas.com/content/support/en_US/article.100046727
WORKAROUND
Perform Agent based Backups of Virtual Machines. Check the Backup Exec Software Compatibility List (SCL) for supported OS version for Agent Backups.
There are currently no plans to address this issue by way of a patch or hotfix in the current or previous versions of the software at the present time. While this issue may be resolved in a future major revision of the software at a later time, it is not currently scheduled for any release. If you feel this issue has a direct business impact for you and your continued use of the product, please contact your Veritas Sales representative or the Veritas Sales group to discuss these concerns.