How to make OTM to work correctly in NetBackup?

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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

http://seer.support.veritas.com/docs/188500.htm

http://seer.support.veritas.com/docs/180017.htm