Residual virtual machine checkpoints remain visible in Hyper-V Manager after differential disk files (.avhdx) have been merged, and they cannot be removed using standard tools such as Hyper-V Manager or PowerShell.

Residual checkpoints after .avhdx consolidation are typically caused by metadata desynchronization between the disk files and Hyper-V configuration. This can happen, for example, when differential disks are manually merged using PowerShell while Hyper-V Manager is still open — in this case, the .avhdx files are correctly merged into the base .vhdx file, but the checkpoint metadata is not removed. Other scenarios can also lead to the same issue, but this is one of the most common.

Issue

You are unable to backup your Hyper-V cluster.

Resolution

To secure a Hyper-V cluster, install a dedicated backup agent on each Hyper-V host. After installation, open XMS, go to Virtual Machines > Hyper-V to add the entire cluster to your backup plan using the dedicated checkboxes.

Issue

Backup (or replication) process finishes with "DW9700 - Creation of Application consistent snapshot failed" error message.

Cause

The error “DW9700 - Creation of Application consistent snapshot failed” usually means that during backup (or replication) process the Xopero system tried to create a VSS snapshot with application consistency, but the process didn’t complete successfully.

Resolution

1. Check whether integration services are enabled in your virtual machine settings (Services > Backup (volume shadow copy) must be checked).

1. Check whether the operating system is supported by Hyper-V:

Issue

VMware backup is missing files and/or folders.

Cause

If your VMware backup ends with warnings, the task details may indicate that one or more files failed to back up. Permissions for the Datastore Browser are managed by the vCenter server — in some cases, access to the Datastore Browser may be disabled for security reasons or to prevent users from accessing core virtual machine files and folders stored on the datastores.

Resolution

Enable the Datastore Browser feature:

1. Stop the VirtualCenter Server service.

2. Back up the configuration file:

   1. For Windows vCenter Server: C:\ProgramData\VMware\VMware VirtualCenter\vpxd.cfg

   2. For vCenter Server Appliance: /etc/vmware-vpx/vpxd.cfg

1. Open the vpxd.cfg file in a text editor.

2. Locate the <vpxd> tags and add the following entry within them:

3. Save the changes.

Issue

You have the license but cannot assign it to your Hyper-V host.

Resolution

To assign the correct installer license for Hyper-V hosts, you must use a dedicated Hyper-V per socket license. This license type is based on the number of processor sockets in the physical machine.

Issue

You cannot see your Hyper-V environment in Xopero ONE Management Service (XMS) even after installing the agent on the host.

Resolution

Remember to use the appropriate installer to natively secure the Hyper-V host for external backup. This dedicated installer can be downloaded from the XMS in Virtual Machines > Hyper-V tab using the (+) Add new button.