Error message:Failed to connect to HyperV Virtual Machine Management service.

Error Description:Hybrid Workloads agent failed to connect to Hyper-V Virtual Machine Management service (HyperV VMMS).

Error Resolution: Ensure that the Hyper-V Virtual Machine Management Service(VMMS), and its dependencies (RPC, WMI) are running. If they fail to start, check the Windows event logs for further details.

Error message:Failed to connect to SCVMM.

Error Description:Hybrid Workloads agent failed to connect to SCVMM.

Error Resolution:Ensure that:

Error message:Failed to connect to cluster with given credentials.

Error Description:Hybrid Workloads agent failed to connect to Cluster.

Error Resolution:Ensure that provided domain credentials are correct. For more information, see Install the agent and register the Hyper-V host.

Error message:Failed to get host info from SCVMM.

Error Description: This error occurs when:

Error Resolution: Verify if the SCVMM is up and running.

Error message:Host is not part of given SCVMM.

Error Description:Hyper-V virtual machine host registered as a part of the SCVMM is actually not a part of the given SCVMM.

Resolution: Verify if the host is registered as a part of the SCVMM.

Error message: Missing credentials for SCVMM/Cluster.

Error Description:Hybrid Workloads agent needs SCVMM/cluster credentials to backup and restore virtual machines hosted on the virtual machine host.

Error Resolution:Provide SCVMM/cluster credentials so that Hybrid Workloads agent can backup and restore virtual machines. For more information, see Install the agent and register the Hyper-V host.

Error message: Virtual disk not found.

Error Description: Hybrid Workloads agent could not find the virtual disk on the host.

Error Resolution: Check if the VHD is present and accessible on the host.

Error message:Failed to get disk info.

Error Description: Hybrid Workloads agent failed to fetch virtual disk information.

Error message:Virtual machine not found.

Error description:A backup job fails with this error:

Error Resolution:

Error message:Virtual machine creation failed.

Error Description: Hybrid Workloads agent failed to create a virtual machine on the Hyper-V host at the time of full virtual machine restore.

Error Resolution: If you are restoring a virtual machine from Windows Server 2008 standard host to Windows 2012 R2 host, you can restore the virtual disk and create a virtual machine using the disk. For other issues, see

Error message: Invalid virtual machine disk path.

Error Description:Hybrid Workloads agent is unable to find the location provided to restore the VHD/VHDX files.

Error Resolution: Ensure that you provide the correct path to restore the VHD/VHDX files.

Error message:Invalid virtual machine config path.

Error Description:Hybrid Workloads agent is unable to find the location provided to restore the XML file.

Resolution: Ensure that you provide correct path to restore the XML file.

Error message:Not enough space available for restore.

Error Description: Enough free space is not available on the location selected to restore virtual machines files (VHD/VHDX and XML).

Error Resolution: Select an alternate location with enough free space to restore the virtual machine files.

Error message:Failed to move existing file.

Error Description: Hybrid Workloads agent cannot restore a virtual machine because it failed to move the (disk/config) file of the existing virtual machine.

Error message:HyperV host with same name already exists.

Error Description: Hyper-V host with the same name is already registered with Druva.

Error Resolution: Read through the activation section of the registration article to learn more about the activation command, and how you can register a host with a different name.

Error message: Failed to get cluster info.

Error Resolution: Verify that the Cluster service is running on the node and review the Failover Cluster environment for any errors or issues.

Error message: Multiple VMs with same UUID exists in cluster/scvmm.

Error Description: Druva does not support a setup that hosts multiple virtual machines that use the same universally unique identifier. Druva cannot back up virtual machines hosted on such a setup.

Error message:VM API error

Error Description:This error occurs when a virtual machine is modified at the time of restore. For example, a virtual machine is modified for resource addition or modification or disk addition or modification at the time of restore.

Error Resolution: Check detailed WMI error message in the Druva logs or contact Support.

Error message: Host OS check failed.

Error Description: This error can occur if you are trying to restore a virtual machine from a newer Windows host to an older Windows host. For example, you back up a virtual machine created on a Windows Server 2016 host and try to restore it on a Windows Server 2012 host. At the time of restoring the virtual machine, the Hybrid Workloads agent checks for the host OS. If the virtual machine is not compatible with the host OS, the host OS check fails with this error.

The following table lists supported restore scenarios:

📝 Note

​A restore job fails if its scenario is not listed above.

Error message: Failed to create file/directory.

Error Description: This error occurs if the Hybrid Workloads agent failed to create a folder at the time of restore.

Error Resolution: Check if the provided path is read-only or the Hybrid Workloads agent cannot write to the provided location. Druva fails to create a file/directory at a location that is read-only or the write permissions are not available to the Hybrid Workloads agent. The Hybrid Workloads agent uses local system account credentials. Check for rights and permissions available to the local system account.

Error message: Failed to delete VM.

Error Description:Hybrid Workloads agent failed to restore a virtual machine because it could not delete the existing virtual machine.

Error Resolution: Check if the existing virtual machine is powered off or restore the virtual machine to an alternate location.

Error message:Failed to backup because both Cluster Shared Volume (CSV) and non-CSV volume are included in the backup.

Error Description: Microsoft does not support CSV and non-CSV volumes in one backup set. Druva will not be able to back up a virtual machine with such configuration.

See Hyper-V backups fail with the HYPERV28 error because the backup includes both CSV and non-CSV volumes

Error message:VM contains user recovery point. File Level Restore will not be supported for this recovery point.

Error Description:Virtual machine had a user recovery point(s) at the time of backup. File Level Restore is not supported for such recovery point. You can restore the virtual machine or the virtual disk.

Resolution: See Troubleshooting.

Error message:This virtual machine recovery point contains user recovery point. File Level Restore is not supported for this recovery point.

Error Description:This recovery point contains user recovery point(s). File Level Restore is not supported for this recovery point. You can restore the virtual machine or the virtual disk and get the required files.

Resolution: See Troubleshooting.

Error message:HyperV FLRProxy with same name already exists.

Error Description: You get this error when you try to activate aHyper-V FLRProxy which is already activated.

Error Resolution: You can use the existing proxy or delete the existing proxy and deploy and register a new proxy.

Error message:Failed to read disk/configfile forHyperVVM

Error Description:Hybrid Workloads agent failed to read the virtual disk/configuration file of the virtual machine at the time of backup.

Error Resolution: Druva requires read permissions for the VHD/VHDX file.

Error message:Failed to add Network Adapter to Virtual Machine

Error Description:Hybrid Workloads agent failed to add a network adapter to the restored virtual machine.

Error Resolution: Check the event logs and see Hyper-V host issues.

Error message:Failed to prepare cluster shared volume for backup

Error Description:Failed to prepare cluster shared volume for backup. This can occur if cluster APIs are not available on the host or the cluster APIs on the host are not working properly.

Error Resolution: Check the event logs and see Hyper-V host issues.

Error message:Failed to get cluster shared volume details

Error Description:This can occur at the time of backup or restore job if the Hybrid Workloads agent is unable to fetch the cluster shared volume details.

Error Resolution: Check if the cluster shared volume is accessible from the Hyper-V host.

Error message:Invalid destination path given

Error Description: The path to the restore location that you provide should be empty.

Error Resolution: Druva requires that the path you provide should be an empty directory. If the directory does not exist, Druva will create the directory.

Error message: Failed to create checkpoint for backup

Error Description:Druva could not create a checkpoint for backup. Check Windowsevent log under Hyper-V-VMMS for more details.

Error Resolution: Check the event logs and see Hyper-V host issues.

Error message:Failed to convert checkpoint to a reference point

Error Description:Druva could not convert a checkpoint to a reference point created for backup. Check Windowsevent log under Hyper-V-VMs for more details.

Error Resolution: Check the event logs and see Hyper-V host issues.

Error message:Failed to open VHD file

Error Description: The Hybrid Workloads agent failed to open the virtual disk to perform a read/write job.

Error Resolution: Ensure that the Hybrid Workloads agent has read-write access to the VHD/VHDX file.

Error message:Failed to write toVHDfile

Error Description: Failed to write to virtual machine disk.

Error message: Original VM restore failed

Error Description:Failed to restorethe virtualmachine to the original location.

Error message: RCT backup not supported for this VM

Error Description: Virtual machine configuration does not support RCT based backup. For RCT based backup:

Error message:No files available tobackup.

Error Description: No disk attached to the virtual machine configured or all virtual disks attached to the virtual machine are excluded from backup.

Error message:No space left ondevicefor restore

Error Description: Disk ran out of space on which the data was getting restored.

Error message: RCT backup not supported on this host

Error Description: Hyper-V RCT backup method is supported from agent version 4.7.5. Upgrade the agent to version 4.7.5 or later.

Error Message: VM migrated to another host.

Error Description: This error occurs when VM is migrated to another host and the Hybrid Workloads agent attempts a backup job when a scheduled job kicks in or when you run it from the Management Console.

Error Resolution: The manual or scheduled backup fails after the VM is migrated. However, the backup job succeeds on a retry.

Error Message: Failed to download from cold storage.

Error Description: This error occurs if the restoration of cold data failed.

Error Resolution: Contact Support.

Error Message: VM contains passthrough/physical disks.

Error Description: Hyper-V does not allow takingrecovery pointsof physical/passthrough disks.

Error Resolution: VM contains a physical or passthrough disk whose backup is not supported. Ensure that you back up these disks using the File Server agent.

Error message:VM contains shared disks

Error Description:This error occurs when an agent attempts to delete therecovery pointscreated during the backup for the VM containing shared disks.

Error Resolution:Detach or remove the shared disks from the VM.