Exchange 2010 snapshots failing

Hi, recently was tasked with implementing new backup/DR requirements for our company. This includes e-mail.

New requirement is 6 snaps daily / rollover first.

Environment: Exchange 2010 SP3 RU9, NMM 3.0.1.3, NW 8.2.0.6.Build.517

NW Server: 8.2.0.6.Build.517

Previously were running NW 8.1 and NMM 3.0.1 and doing Federated DAG with Rollover only once a day.

Upgraded Networker server and client pieces and now get nothing but errors (cryptic message "internal error").

I've attached NMM.raw and a trace file.

I went back to one per day and no snapshot retention and still same errors. I have NOT tried reverting to Federated DAG backup to test. But federated dag doesn't allow retention, so doesn't meet requirements.