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Windows FLR fails with "Failed to create or open file [C:\Windows\system32\config\systemprofile\"

KB ID: 2162
Product: Veeam Backup & Replication | 11 | 12 | 12.1
Published: 2016-09-05
Last Modified: 2023-06-16
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Challenge

When attempting to perform a Guest OS File Level Restore from a Windows Filesystem the mount Backup Browser displays the error:

The system cannot find the path specified.
Failed to create or open file [C:\Windows\system32\config\systemprofile\...\veeamflr-.flat].
Agent failed to process method {Mount.GenericMount}.
error

Log Example to Confirm Applicability

C:\ProgramData\Veeam\Backup\Svc.VeeamMount.log

cli      | ERR |Failed to process {Invoke} command
cli | >> |Duration: [00:00:00.922]
cli | >> |Details:
cli | >> |The system cannot find the path specified.
cli | >> |Failed to create or open file [C:\Windows\system32\config\systemprofile\wefbxn4t.vhm\veeamflr-4022958bbfc4fb3e-0000.flat].
cli | >> |--tr:Error code: 0x00000003
cli | >> |--tr:Failed to mount disks via VeeamFLR.
cli | >> |--tr:Failed mount filesystem for the FSR restore.
cli | >> |Agent failed to process method {Mount.GenericMount}.

Cause

The environment variables for %tmp% and %temp% are missing or not set for the local system (SYSTEM).

Solution

On the machine where the Veeam Backup & Replication Console was launched and the Mount Server assigned to the Repository where the backup files are stored, ensure that the following regitrisy values exist.

Key Location: HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment 
Value Name: TMP
Value Type: Expandable String Value
Value Data: %SystemRoot%\TEMP

Key Location: HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment 
Value Name: TEMP
Value Type: Expandable String Value 
Value Data: %SystemRoot%\TEMP

Reboot after creating.

PowerShell cmdlet to create registry values:
Note: These powershell cmdlets do not check if the registry values exist or are set to a different value.

New-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" -Name "TMP" -Value "%SystemRoot%\TEMP" -PropertyType ExpandString -Force
New-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" -Name "TEMP" -Value "%SystemRoot%\TEMP" -PropertyType ExpandString -Force
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