Hyper-V Server 2016 - Communication could not be established to the CBT driver

Hello community,

I will test the Vembu BDR Backup Software in Version 3.9.1.

Environment: Windows Server 2016 Hyper-V Host with local Storage (ReFS) for VMs on disk D:\ The Service is running as Domain user with local admin rights. Windows Server 2016 VMs as backup source. Backup Target: SMB NAS CIFS Share.

I installed and configure the Vembu Integration Service on the Hyper-V Host. The Vembu Integration Service is running with the same Domain user with local admin Rights, too.

But I get every time the error message: Communication could not be established to the CBT Driver: 05-06-18 19:49:08 ERROR [ HyperVBackup::GetVMConfigurationPath ] <hypervbackup>GetVMConfigurationPath:: After executing the command, error if present:: [HyperVBackup.cpp:5949] 05-06-18 19:49:08 ERROR [ HyperVBackup::SendSignaltoCBTDriver ] <hypervbackup>SendSignaltoCBTDriver::Communication could not be established to the CBT driver for VHD D:\VMs\SRVxxx\Virtual Hard Disks\SRVxxx_C.vhdx [HyperVBackup.cpp:8187]

Under the link I could achieve no improvement

https://www.vembu.com/support/knowled...

Thanks for Your assistance!

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