Dear Mr Pamminger,
It seems the LOAD fails upon the first request from the ASE to the HP DP API .
To me it looks as if the issue is inside HP dataprotector - I assume somehow it does not map the request from server B to the correct volume (as it is from server A) - or there is a permission issue inside HP DP (maybe the DP client on host B is not allowed to requestd objects of serve A)
Did you (or your HP DP Admin) find anything useful in SP logs ?
With kind regards
Tilman Model-Bosch