VM Hyper-v backup end in status job 48

HI all,

I need some suggestion, on host Hyper-v I have a lot of VM and the backup of all those VM work fine.

Only one backup end in status job 48. I try ping and nslookup from Master and Media and it is all ok, also the reverse lookup is ok.

I read this:

The problem may be one of the following:

•The NetBackup master server cannot communicate with the virtual machine.


•The host name of the virtual machine is not available.

The NetBackup job details log contains the following message:
Error bpbrm(pid=8072) Nameuse [0], VM [<vm name>]
not found on any node. Is either powered off or does 
not exist.

The virtual machine is either not running, or it is booting up. Make sure that the virtual machine is running and then rerun the backup.

but the VM is up and running.

Master Server:

OS windows server 2012 Standard

NBU version

HARDWARE Windows x64
VERSION NetBackup 7.6.0.4
RELEASEDATE Fri Oct 24 21:13:39 2014
BUILDNUMBER 20141024

Host Hyper-v:

OS windows server 2012 R2 Datacenter

HARDWARE Windows x64
VERSION NetBackup 7.6.0.1
RELEASEDATE Wed Nov 13 14:31:30 2013
BUILDNUMBER 20131113

VM:

OS windows server 2012 R2 Standars