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This KB is only relevant when all three of the following errors occur. The Task Summary displays: Failed to prepare guest for hot backup. Error: Cannot upload guest agent's files to the administrative share [\\...\ADMIN$]. Cannot copy file. Source file: [..\VeeamGuestAgent_X__.exe]. Target file: [\\...\ADMIN$\VeeamVssSupport\VeeamGuestAgent.exe]. CopyFile() failed. Win32 error:The process cannot access the file because it is being used by another process. Code: 32 The Task Log Contains the following: Veeam Guest Agent is not started at Veeam.Backup.Core.CViGuestInventoryInformer.IsEnabled() at Veeam.Backup.Core.CViGuestInventoryInformer.Veeam.Backup.Core.IGuestInventoryInformer.TryToInventory(CGuestInventoryInfo& inventoryInfo) Cannot upload guest agent's files to the administrative share [\\...\ADMIN$]. Cannot copy file. Source file: [..\VeeamGuestAgent_X__.exe]. Target file: [\\...\ADMIN$\VeeamVssSupport\VeeamGuestAgent.exe]. The VeeamVssSupport Service is Hung within the Guest OS Check the VeeamGuestHelper log found in C:\ProgramData\Veeam\Backup Contains Updating Windows Firewall exceptions list.. Ok. Registering RPC protocol sequences used by the server. Registering RPC protocol sequences used by the server.. Failed. ERR Cannot register RPC protocol sequences used by the server. ERR Cannot force RPC run-time library to use all supported protocol sequences for receiving remote procedure calls. ERR RPC error:The parameter is incorrect. ERR Code: 87
Windows API function RpcServerUseProtseq, which is used to registers RPC endpoints, fails.
This issue occurs, when RPC settings have been customized and are not properly configured in registry. By default the HKLM\SOFTWARE\MICROSOFT\RPC\INTERNET key does not exist, if it is presented it must have been created. Likely, it was created by someone reviewing the information found here, or another article discussing that specific registry key. Remove RPC Customized Settings: Log on to Guest VM Open the Registry Editor (regedit) Navigate to HKLM\SOFTWARE\MICROSOFT\RPC\INTERNET Export the INTERNET key to back it up. Delete the entire INTERNET (and it's sub-keys). Reboot the Guest, run the Veeam job again
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