It would help out if you put some of the log file output here also to see if we can help but would recommend creating a support ticket also.
Logs are here - C:\ProgramData\Veeam\Backup - the job you ran will be a folder in here with the logs.
Hello, once I had a similar error, I do not say that in v12 but in v11, I relocated my backup file in another repository, I did a rescan and tried again working
Here is part of the Svc.VeeamMount.log. It contains the error and some context.
The VBR 12 server is nothing special, just a Windows Server 2022 Standard.
[12.04.2023 22:41:12.188] <39> Info Creating common mount points detector...
[12.04.2023 22:41:12.213] <39> Info Found SYSTEM registry hive: 'C:\VeeamFLR\fhwsus02_8814eb8f\Volume1\Windows\System32\config\SYSTEM'.
[12.04.2023 22:41:12.217] <39> Info Found exported registry hive: C:\VeeamFLR\fhwsus02_8814eb8f\Volume1\Windows\System32\config\SYSTEM.{76084AB0-E15A-44A4-8E9E-1B8D82698635}
[12.04.2023 22:41:12.219] <39> Info Original hive modification time: 12-04-2023 20:07:32
[12.04.2023 22:41:12.220] <39> Info Exported hive modification time: 12-04-2023 22:24:37
[12.04.2023 22:41:12.220] <39> Info Deleting original hive C:\VeeamFLR\fhwsus02_8814eb8f\Volume1\Windows\System32\config\SYSTEM
[12.04.2023 22:41:12.221] <39> Info Renaming exported hive C:\VeeamFLR\fhwsus02_8814eb8f\Volume1\Windows\System32\config\SYSTEM.{76084AB0-E15A-44A4-8E9E-1B8D82698635} to SYSTEM
[12.04.2023 22:41:12.225] <39> Info Copy registry hive to temp folder before load.
[12.04.2023 22:41:12.745] <39> Error Retrieved incorrect string: do rpc - The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
[12.04.2023 22:41:12.745] <39> Error Failed to call RegLoadKey function.
[12.04.2023 22:41:12.745] <39> Error --tr:Error code: 0x000003f9
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to complete RPC request. Method: [RegAttachHiveFile], In XML: [<InputArguments><ParentKey value="2" /><KeyPath value="SYSTEMcbd578e028c8482daf266223ce5e14e1" /><File value="C:\Windows\TEMP\SYSTEMcbd578e028c8482daf266223ce5e14e1" /><OverrideSequenceNumber value="True" /></InputArguments>]
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to invoke RPC request
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to call DoRpc. CmdName: [DoSerialRpc] inParam: [<InputArguments/>].
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to call DoRpcWithBinary. Method: [DoSerialRpc], In xml: [<InputArguments/>]
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to call DoRpcWithBinary
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to do RPC call with serialized data, Strategy type: DefaultStrategy
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to call [DoSerialRpc], session id: {fe2b69bf-593a-44a8-8b6c-0422e15df8fc}
[12.04.2023 22:41:12.745] <39> Error --tr:Failed to call [RegAttachHiveFile]
[12.04.2023 22:41:12.745] <39> Error [CProxyRpcInvoker] Failed to call RPC function 'RegAttachHiveFile': The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format. Failed to call RegLoadKey function.. InParams: '<InputArguments><ParentKey value="2" /><KeyPath value="SYSTEMcbd578e028c8482daf266223ce5e14e1" /><File value="C:\Windows\TEMP\SYSTEMcbd578e028c8482daf266223ce5e14e1" /><OverrideSequenceNumber value="True" /></InputArguments>'.
[12.04.2023 22:41:12.745] <39> Error The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
[12.04.2023 22:41:12.745] <39> Error Failed to call RegLoadKey function.
[12.04.2023 22:41:12.745] <39> Error (System.ApplicationException)
[12.04.2023 22:41:12.745] <39> Error at Veeam.Backup.ProxyProvider.CNativeAccessor.GenerateExceptionWithoutTrace(Exception ex)
[12.04.2023 22:41:12.745] <39> Error at Veeam.Backup.ProxyProvider.CNativeAccessor.CheckString(String value, String message)
[12.04.2023 22:41:12.745] <39> Error at Veeam.Backup.ProxyProvider.CProxyRpcInvoker.Call(String methodName, CProxyInvokeInputArg inputArgs, Boolean secureCall)
[12.04.2023 22:41:12.745] <39> Warning Unexpected rpc exception type System.ApplicationException
[12.04.2023 22:41:12.745] <09> Error [RPC] The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
[12.04.2023 22:41:12.745] <09> Error [RPC] Failed to call RegLoadKey function.
[12.04.2023 22:41:12.745] <09> Error [RPC] --tr:Error code: 0x000003f9
[12.04.2023 22:41:12.745] <09> Error [RPC] --tr:Failed to complete RPC request. Method: [RegAttachHiveFile], In XML: [<InputArguments><ParentKey value="2" /><KeyPath value="SYSTEMcbd578e028c8482daf266223ce5e14e1" /><File value="C:\Windows\TEMP\SYSTEMcbd578e028c8482daf266223ce5e14e1" /><OverrideSequenceNumber value="True" /></InputArguments>]
[12.04.2023 22:41:12.745] <09> Error [RPC] --tr:Failed to invoke RPC request
[12.04.2023 22:41:12.745] <09> Error [RPC] --tr:Failed to call DoRpc. CmdName: [DoSerialRpc] inParam: [<InputArguments/>].
[12.04.2023 22:41:12.745] <09> Error [RPC] --tr:Failed to call DoRpcWithBinary. Method: [DoSerialRpc], In xml: [<InputArguments/>]
[12.04.2023 22:41:12.745] <09> Error [RPC] --tr:Failed to call DoRpcWithBinary
[12.04.2023 22:41:12.746] <09> Error [RPC] --tr:Failed to do RPC call with serialized data, Strategy type: DefaultStrategy
[12.04.2023 22:41:12.746] <09> Error [RPC] --tr:Failed to call [DoSerialRpc], session id: {fe2b69bf-593a-44a8-8b6c-0422e15df8fc}
[12.04.2023 22:41:12.746] <09> Error [RPC] --tr:Failed to call [RegAttachHiveFile]
[12.04.2023 22:41:12.758] <39> Error Failed to mount remote disks for the file level restore
[12.04.2023 22:41:12.758] <39> Error [fhbu02] Failed to attach hive file. Path: [C:\Windows\TEMP\SYSTEMcbd578e028c8482daf266223ce5e14e1] (System.Exception)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.ProxyProvider.CRpcProxyRegistryCommanderImpl.AttachHiveFile(EHKey hiveKey, String subKey, String filePath)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CRemoteRegistryCommander.Veeam.Backup.Core.IRegistryCommander.AttachHiveFile(EHiveKeys hiveKey, String subKey, String filePath)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Common.CRegistryHiveLoadSession..ctor(IFileCommander fileCommander, String hiveFilePath, Boolean readonlyUsage, IRegistryCommander regCommander, Boolean forceOverwriteRegistryFile, Boolean useCopyFromRemoteStrategy)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CWinMountRegistryHelper.LoadMountedDevicesFromRegistry(String registryHivePath, IRegistryCommander regCommander, IFileCommander fileCommander)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CWinMountPointsDetector..ctor(IFileCommander fileCommander, IRegistryCommander registryCommander, String[] mountedMountPoints)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CWinMountSessionMountPointsDetector.CreateMountPointsDetector(String[] mountedMountPoints)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CMountResultBuilder.Build()
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CFlat2FsMounter.Mount(IFsrMountSession mountSession, IEnumerable`1 flats, CDiskIdRemapper idRemapper, CBackupVolumeInfo[] volumeInfoFromBackup)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.Core.CVeeamFctMounter.Mount(IMountSource source, IEnumerable`1 processingParams, CAsyncMountModeSelector mountMode, CTerminationMediator cancelMediator)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.MountServiceLib.CFlrDisksMounter.Mount(Boolean isShieldedVm, Boolean isKdsUsed, CAsyncMountModeSelector mountMode, CTerminationMediator cancelMediator)
[12.04.2023 22:41:12.758] <39> Error The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
[12.04.2023 22:41:12.758] <39> Error (Veeam.Backup.Common.CCppCOMException)
[12.04.2023 22:41:12.758] <39> Error Failed to call RegLoadKey function.
[12.04.2023 22:41:12.758] <39> Error (Veeam.Backup.Common.CCppComponentException)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.ProxyProvider.CProxyRpcInvoker.Call(String methodName, CProxyInvokeInputArg inputArgs, Boolean secureCall)
[12.04.2023 22:41:12.758] <39> Error at Veeam.Backup.ProxyProvider.CRpcProxyRegistryCommanderImpl.AttachHiveFile(EHKey hiveKey, String subKey, String filePath)
[12.04.2023 22:41:12.759] <39> Error Mount was failed
[12.04.2023 22:41:12.759] <39> Error [fhbu02] Failed to attach hive file. Path: [C:\Windows\TEMP\SYSTEMcbd578e028c8482daf266223ce5e14e1] (System.Exception)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.ProxyProvider.CRpcProxyRegistryCommanderImpl.AttachHiveFile(EHKey hiveKey, String subKey, String filePath)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CRemoteRegistryCommander.Veeam.Backup.Core.IRegistryCommander.AttachHiveFile(EHiveKeys hiveKey, String subKey, String filePath)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Common.CRegistryHiveLoadSession..ctor(IFileCommander fileCommander, String hiveFilePath, Boolean readonlyUsage, IRegistryCommander regCommander, Boolean forceOverwriteRegistryFile, Boolean useCopyFromRemoteStrategy)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CWinMountRegistryHelper.LoadMountedDevicesFromRegistry(String registryHivePath, IRegistryCommander regCommander, IFileCommander fileCommander)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CWinMountPointsDetector..ctor(IFileCommander fileCommander, IRegistryCommander registryCommander, String[] mountedMountPoints)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CWinMountSessionMountPointsDetector.CreateMountPointsDetector(String[] mountedMountPoints)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CMountResultBuilder.Build()
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CFlat2FsMounter.Mount(IFsrMountSession mountSession, IEnumerable`1 flats, CDiskIdRemapper idRemapper, CBackupVolumeInfo[] volumeInfoFromBackup)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.Core.CVeeamFctMounter.Mount(IMountSource source, IEnumerable`1 processingParams, CAsyncMountModeSelector mountMode, CTerminationMediator cancelMediator)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.MountServiceLib.CFlrDisksMounter.Mount(Boolean isShieldedVm, Boolean isKdsUsed, CAsyncMountModeSelector mountMode, CTerminationMediator cancelMediator)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.MountServiceLib.CWinOibMountSession.Mount(CTerminationMediator cancelMediator)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.MountServiceLib.COibMount..ctor(IOibMountSession mountSession, IFlrOibGetter oibGetter, Guid leaseId, Guid oibId, COperationCancelMediator cancelMediator)
[12.04.2023 22:41:12.759] <39> Error The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
[12.04.2023 22:41:12.759] <39> Error (Veeam.Backup.Common.CCppCOMException)
[12.04.2023 22:41:12.759] <39> Error Failed to call RegLoadKey function.
[12.04.2023 22:41:12.759] <39> Error (Veeam.Backup.Common.CCppComponentException)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.ProxyProvider.CProxyRpcInvoker.Call(String methodName, CProxyInvokeInputArg inputArgs, Boolean secureCall)
[12.04.2023 22:41:12.759] <39> Error at Veeam.Backup.ProxyProvider.CRpcProxyRegistryCommanderImpl.AttachHiveFile(EHKey hiveKey, String subKey, String filePath)
[12.04.2023 22:41:12.759] <39> Info [AP] (432a3d4a) command: 'Invoke: FileSystem.VmdkUmountAll '
[12.04.2023 22:41:12.763] <71> Info [AP] (432a3d4a) output: <VCPCommandResult result="true" exception="" />
[12.04.2023 22:41:12.774] <70> Info [AP] (432a3d4a) output: <VCPCommandArgs />
[12.04.2023 22:41:12.775] <70> Info [AP] (432a3d4a) output: >
[12.04.2023 22:41:12.775] <39> Info [AP] (432a3d4a) command: 'Invoke: VDK.Close { (EInt32) Partition = 0; }'
[12.04.2023 22:41:13.198] <71> Info [AP] (432a3d4a) output: <VCPCommandResult result="true" exception="" />
[12.04.2023 22:41:13.198] <71> Info [AP] (432a3d4a) output: <VCPCommandArgs />
[12.04.2023 22:41:13.198] <71> Info [AP] (432a3d4a) output: >
[12.04.2023 22:41:13.199] <39> Info [AP] (432a3d4a) command: 'Invoke: VDK.Close { (EInt32) Partition = 1; }'
[12.04.2023 22:41:13.416] <70> Info [AP] (432a3d4a) output: <VCPCommandResult result="true" exception="" />
[12.04.2023 22:41:13.416] <70> Info [AP] (432a3d4a) output: <VCPCommandArgs />
[12.04.2023 22:41:13.416] <70> Info [AP] (432a3d4a) output: >
[12.04.2023 22:41:13.417] <39> Info [AP] (432a3d4a) command: 'Invoke: Mount.GenericDismount '
[12.04.2023 22:41:14.023] <71> Info [AP] (432a3d4a) output: <VCPCommandResult result="true" exception="" />
[12.04.2023 22:41:14.027] <72> Info [AP] (432a3d4a) output: <VCPCommandArgs />
[12.04.2023 22:41:14.028] <72> Info [AP] (432a3d4a) output: >
[12.04.2023 22:41:14.029] <39> Info [CPersistentAgentHive] Unregistering agent. AgentId: [ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce].
[12.04.2023 22:41:14.030] <39> Info [CPersistentAgentHive] Agent unregistered [True].
[12.04.2023 22:41:14.030] <39> Info [AP] (432a3d4a) disconnecting
[12.04.2023 22:41:14.033] <72> Info [AP] (432a3d4a) output: >
[12.04.2023 22:41:14.034] <39> Info [AP] Disposing client from thread 39
[12.04.2023 22:41:14.034] <39> Info Disposing BaseAgentProtocol [0x22cd095]
[12.04.2023 22:41:14.034] <39> Info Disposing CSocketAgentService [0x22f2e08], sessionId [432a3d4a]
[12.04.2023 22:41:14.034] <39> Info [SocketAgentService] Closing connection to agent 'fhbu02', id 432a3d4a
[12.04.2023 22:41:14.034] <39> Info [ReconnectableSocket] Stop request was sent on [8afe435d-6618-4df0-a9f7-c8dcb07c7f0f].
[12.04.2023 22:41:14.034] <66> Info [ReconnectableSocket][StopCondition] Stop confirmation was received on [8afe435d-6618-4df0-a9f7-c8dcb07c7f0f].
[12.04.2023 22:41:14.035] <66> Info [ReconnectableSocket] Stop confirmation was sent on [8afe435d-6618-4df0-a9f7-c8dcb07c7f0f].
[12.04.2023 22:41:14.035] <66> Info [ReconnectableSocket][StopCondition] Stop request was received on [8afe435d-6618-4df0-a9f7-c8dcb07c7f0f].
[12.04.2023 22:41:14.037] <39> Info Disposing CProxyAgent [0x3abf30d], agent id ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce
[12.04.2023 22:41:14.038] <39> Info [AP] Disposing client from thread 39
[12.04.2023 22:41:14.038] <39> Info Disposing BaseAgentProtocol [0x18cdc0e]
[12.04.2023 22:41:14.039] <39> Info Disposing CSocketAgentService [0x196652b], sessionId [f815ca21]
[12.04.2023 22:41:14.039] <39> Info [SocketAgentService] Closing connection to agent 'fhbu02', id f815ca21
[12.04.2023 22:41:14.041] <39> Info [CTransportSvcAgentManager] Stopping agent, id 'ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce'
[12.04.2023 22:41:14.042] <39> Info [CTransportSvcAgentManager] Closing port before agent stop, id 'ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce'.
[12.04.2023 22:41:14.042] <39> Info [CTransportSvcAgentManager] Sending signal to stop agent with timeout (10 sec), id ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce. Host: fhbu02.
[12.04.2023 22:41:14.044] <39> Info [CTransportSvcAgentManager] Checking whether agent 'ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce' is alive on host 'fhbu02' with timeout.
[12.04.2023 22:41:15.049] <39> Info [CTransportSvcAgentManager] Checking whether agent 'ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce' is alive on host 'fhbu02' with timeout.
[12.04.2023 22:41:15.049] <39> Info [CTransportSvcAgentManager] Agent has been stopped, id 'ddfb9cf6-8c88-4c3a-8e18-e645452fb8ce'
[12.04.2023 22:41:15.050] <39> Info [CProxyRpcInvoker] RpcInvoker [3991620] was disposed
[12.04.2023 22:41:15.051] <09> Info [RPC] Destroying RPC confirm session. Id: {1b4dd544-34e7-4f04-8aad-02b4c586f849}
[12.04.2023 22:41:15.052] <39> Info [CProxyRpcInvoker] RpcInvoker [14702683] was disposed
[12.04.2023 22:41:15.057] <09> Info [RPC] Destroying RPC confirm session. Id: {fe2b69bf-593a-44a8-8b6c-0422e15df8fc}
[12.04.2023 22:41:15.058] <39> Info [CProxyRpcInvoker] RpcInvoker [10194714] was disposed
[12.04.2023 22:41:15.059] <39> Info -----------------------------------------
[12.04.2023 22:41:15.163] <68> Error Operation [MountOib, 3ebb372d-2401-4e70-9210-77c43ff558ba] complete with error
[12.04.2023 22:41:15.163] <68> Error Failed to call RPC function 'RegAttachHiveFile': The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format. Failed to call RegLoadKey function. (System.Exception)
[12.04.2023 22:41:15.163] <68> Error Server stack trace:
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.COibMount..ctor(IOibMountSession mountSession, IFlrOibGetter oibGetter, Guid leaseId, Guid oibId, COperationCancelMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.CMountOibOperation.MountOibSync(CMountLogHeader logHeader, COibMountSpec mountSpec, COperationCancelMediator cancelMediator, COibMountUid& oibMountUid)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.CMountOibOperation.ExecuteProcImpl(COperationCancelMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.CMountServerSideOperation.Veeam.Common.WinService.IOperationImpl.ExecuteProc(COperationCancelMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
[12.04.2023 22:41:15.163] <68> Error at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)
[12.04.2023 22:41:15.163] <68> Error Exception rethrown at [0]:
[12.04.2023 22:41:15.163] <68> Error at System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase)
[12.04.2023 22:41:15.163] <68> Error at System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData)
[12.04.2023 22:41:15.163] <68> Error at System.Func`2.EndInvoke(IAsyncResult result)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Common.WinService.COperationExecutor.EnsureActualResultWasFilled()
[12.04.2023 22:41:15.163] <68> Error [fhbu02] Failed to attach hive file. Path: [C:\Windows\TEMP\SYSTEMcbd578e028c8482daf266223ce5e14e1] (System.Exception)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.ProxyProvider.CRpcProxyRegistryCommanderImpl.AttachHiveFile(EHKey hiveKey, String subKey, String filePath)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CRemoteRegistryCommander.Veeam.Backup.Core.IRegistryCommander.AttachHiveFile(EHiveKeys hiveKey, String subKey, String filePath)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Common.CRegistryHiveLoadSession..ctor(IFileCommander fileCommander, String hiveFilePath, Boolean readonlyUsage, IRegistryCommander regCommander, Boolean forceOverwriteRegistryFile, Boolean useCopyFromRemoteStrategy)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CWinMountRegistryHelper.LoadMountedDevicesFromRegistry(String registryHivePath, IRegistryCommander regCommander, IFileCommander fileCommander)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CWinMountPointsDetector..ctor(IFileCommander fileCommander, IRegistryCommander registryCommander, String[] mountedMountPoints)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CWinMountSessionMountPointsDetector.CreateMountPointsDetector(String[] mountedMountPoints)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CMountResultBuilder.Build()
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CFlat2FsMounter.Mount(IFsrMountSession mountSession, IEnumerable`1 flats, CDiskIdRemapper idRemapper, CBackupVolumeInfo[] volumeInfoFromBackup)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.Core.CVeeamFctMounter.Mount(IMountSource source, IEnumerable`1 processingParams, CAsyncMountModeSelector mountMode, CTerminationMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.CFlrDisksMounter.Mount(Boolean isShieldedVm, Boolean isKdsUsed, CAsyncMountModeSelector mountMode, CTerminationMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.CWinOibMountSession.Mount(CTerminationMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.MountServiceLib.COibMount..ctor(IOibMountSession mountSession, IFlrOibGetter oibGetter, Guid leaseId, Guid oibId, COperationCancelMediator cancelMediator)
[12.04.2023 22:41:15.163] <68> Error The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
[12.04.2023 22:41:15.163] <68> Error (Veeam.Backup.Common.CCppCOMException)
[12.04.2023 22:41:15.163] <68> Error Failed to call RegLoadKey function.
[12.04.2023 22:41:15.163] <68> Error (Veeam.Backup.Common.CCppComponentException)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.ProxyProvider.CProxyRpcInvoker.Call(String methodName, CProxyInvokeInputArg inputArgs, Boolean secureCall)
[12.04.2023 22:41:15.163] <68> Error at Veeam.Backup.ProxyProvider.CRpcProxyRegistryCommanderImpl.AttachHiveFile(EHKey hiveKey, String subKey, String filePath)
[12.04.2023 22:41:15.163] <68> Info Operation [MountOib, 3ebb372d-2401-4e70-9210-77c43ff558ba] complete in [00:00:15.3368065]. Result: [Failed to call RPC function 'RegAttachHiveFile': The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format. Failed to call RegLoadKey function.]
[12.04.2023 22:41:15.167] <68> Info Operation [MountOib, 3ebb372d-2401-4e70-9210-77c43ff558ba] has been deleted
[12.04.2023 22:41:16.299] <68> Info Removing restore session [8890cd3f-be9b-403e-a532-6a32ecef1dbe] from collection
[12.04.2023 22:41:16.299] <68> Info Disposing COperationManager
[12.04.2023 22:41:16.299] <68> Info [StorageRestoreAgentPool] Disposing all storage agent providers
[12.04.2023 22:41:16.299] <68> Info [StorageRestoreAgentPool] All storage agent providers disposed
[12.04.2023 22:41:16.299] <68> Info [InMemoryLeaseHive] Destroying lease [63268ad5d81b4b36adf247daf7b9e1c4]
[12.04.2023 22:41:16.299] <68> Info [InMemoryLeaseHive] Lease destroyed [True]
[12.04.2023 22:41:16.302] <66> Info [Session 90791e1e-8031-475d-9111-5fd23a54b438] Closing...
Based on this your best bet is to open a support case to upload the logs and help determine the issue. It is hard to parse through those and logs you upload to Veeam will have more data for them to analyze.
I will try to go through this and see unless someone beats me to it. LOL
Are you able to launch the Backup Browser successfully and able to navigate to the file you want to restore correctly?
Yes, the Backup Browser loads when I start a restore job. It won’t let me browse anything because of the errors.
There is something you can try. Launch the restore session and then wait until the Backup Browser loads.
Navigate to C:\VeeamFLR, I think it’s called of the top of my head. That is usually where the backup will be mounted. See if you are able to access the files you need that way.
Are you able to launch the Backup Browser successfully and able to navigate to the file you want to restore correctly?
Yes, the Backup Browser loads when I start a restore job. It won’t let me browse anything because of the errors.
There is something you can try. Launch the restore session and then wait until the Backup Browser loads.
Navigate to C:\VeeamFLR, I think it’s called of the top of my head. That is usually where the backup will be mounted. See if you are able to access the files you need that way.
A folder is created with subfolders but they disappear when the error pops up. There is not enough time to really see what’s there.
Is there enough space on the C drive? Just checking on that. Maybe you need to move the mount folder to another drive.
There is more than enough space available.
BTW: guest files restore of a Linux machine does work.
Ok, interesting addition below.
When I create a backup job containing several Windows VM’s, say all domain members, the guest file restore of a VM from that job fails with the errors shown above.
But when I create individual jobs for each VM I am able to use the guest file restore...
I did some more testing and I can confirm what I posted above.
One job containing more than 1 VM and a Guest Files restore produces an error.
Several jobs all containing just one VM and the Guest Files restore succeeds.
Hi
Please open a support ticket first before coming to the RnD forum. To confirm if it‘s a bug or not we need your debug logs. You may post the bug the forum, but a support case id must be provided.
Our customer support has the right tools and training to go through the debug logs and decide if it‘s a bug or environmental issue.
Thanks,
Fabian
I did some more testing and I can confirm what I posted above.
One job containing more than 1 VM and a Guest Files restore produces an error.
Several jobs all containing just one VM and the Guest Files restore succeeds.
Sorry, my findings above were not correct. Yet again did more testing. I can do a guest files restore but:
- Only when it is a Windows Server 2019 VM.
- Or it is the backup server itself which is running Windows Server 2022.
Whenever I try to do a guest files restore of a Windows Server 2022 VM, I get the error I posted above.
Again, sorry for the confusion.
@HanAre the 2022 VMs and the VBR server on the same build/patch level? And like Michael wrote, do you maybe have deduplication enabled?
You can open a support case with a NFR license but you'll only receive best effort support. This means if Veeam support doesn't have any free slots, your case may get closed.