After Veeam 6.5 to 7.0 upgrade, some VMs which have application aware enabled gave the following error.
Unable to truncate transaction logs. Details: RPC function call failed. Function name: [BlobCall]. Target machine:
[xx.xx.xx.xx]. RPC error:The remote procedure call failed. Code: 1726
Also you may see Veeam guest agent services are terminating unexpectedly in your windows event logs..
Faulting application name: VeeamGuestAgent.exe, version: 18.104.22.1680, time stamp: 0x520b81e7
Faulting module name: dbghelp.dll, version: 6.1.7601.17514, time stamp: 0x4ce7c5ac
Exception code: 0xc00000fd
I checked ( permissions, VSS writers etc etc ) on VM side but no success.
In my solution,
I disabled application aware processing on backup job. Took a backup. Then re-enabled application aware processing and it is now working fine. I think veeam server pushed a new guest agent on VM side. Now I see no more service termination events and logs are truncated successfully. Hope this helps in your case.