After Upgrade from 7.03 to 9.05 - Tape Library Problem

Hi guys,

I updated today my DP7.03 to DP9.05, after I tested the upgrade process in a sandbox, but unfortunately backup and restore doesn't work anymore on the tape library (Overland NEO2000e LTO5).

I tried to backup the IDB and a simple text file from the backup server, but everytime the session aborts with the following error message:

[Critical] From: VBDA@<servername> "E: [Backup]"  Time: 12/16/2015 2:11:57 PM
	IPC failure reading NET message (IPC Read Error
	System error: [10054] Connection reset by peer
) => aborting.

[Critical] From: VBDA@<servername>"E: [Backup]"  Time: 12/16/2015 2:11:57 PM
	Connection to Media Agent broken => aborting.


[Major] From: BSM@<servername> "test"  Time: 12/16/2015 2:11:57 PM
[61:3003]  	Lost connection to BMA named "IBM:ULTRIUM-TD5_1"
	on host<servername>.
	Ipc subsystem reports: "IPC Read Error
	System error: [10054] Connection reset by peer
"

[Critical] From: BSM@<servername> "test"  Time: 12/16/2015 2:11:57 PM
	None of the Disk Agents completed successfully.
	Session has failed.

First I thought it was the encryption keys, but they are all there, but I already uploaded the *.cvs again, just for sure.

So I tested backup & restore via our D2D and this way works like a charm!

The library get the command to load the tape, the tape was loaded but then the session aborts. The tape stucks and I have to move the tape manually from the tape drive back to the slot..

Any idea what problem this could be?

Thanks and best regards,

Tobias