V-79-57344-1542 - The version of the Backup Exec Remote Agent that is running on the remote computer has reached its maximum supported backup set size. The backup of resource '\\SERVERNAME\[ROOT]' was terminated. Upgrade the Remote Agent on the remote computer to back up this resource.
Veritas recommend to take backup by splitting the backup job when source data is greater than 4TB in size.
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.
This is by design.