How to make OTM to work correctly in NetBackup?
From Backup Central
This a 3.4 answer. We need a new question for 5.x and following.
Set HKEY_LOCAL_MACHINE\SOFTWARE\Veritas\NetBackup\CurrentVersion\Config\OTM_Cache_Size_Max to 0. See also:
http://seer.support.veritas.com/docs/180011.htm