The Bengine.exe process may crash during either incremental or differential backups to disk using true image restore technology and or synthetic backup technology.
From the Bengine.exe crash dump:
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 2010 Rev 5204 Service Pack 3 (TECH203157)