Hyper-V Backup jobs failing with an error "The system cannot find the file specified" after upgrade to Veeam B&R 9.5 Update 4

KB ID: 2890
Product: Veeam Backup & Replication
Version: 9.5.4.2615
Published: 2019-02-07
Last Modified: 2021-03-22
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Challenge

After installing Veeam Backup & Replication 9.5 Update 4, Hyper-V backup without application-aware processing may fail with the error "The system cannot find the file specified".
Version Specific Article
This article is relevant only to Veeam Backup & Replication 9.5.4.2615.

Cause

This issue is caused by the snapshot path in the VM 's configuration being different from the actual path on a file system in terms of symbols capitalization. You can confirm this by comparing paths in bold in the Task.<VM NAME>.<VM UUID>.log file:

[22.01.2019 19:39:09] <28> Info                   [AP] (65e8) output:     <snapshots>
[22.01.2019 19:39:09] <28> Info                   [AP] (65e8) output:       <data_root type="string">C:\Temp\<VM name></data_root>
[22.01.2019 19:39:09] <28> Info                   [AP] (65e8) output:       <list>
[22.01.2019 19:39:09] <28> Info                   [AP] (65e8) output:         <size type="integer">0</size>
[22.01.2019 19:39:09] <28> Info                   [AP] (65e8) output:       </list>
[22.01.2019 19:39:09] <28> Info                   [AP] (65e8) output:     </snapshots>


[22.01.2019 19:39:09] <11> Info [AP] (65e8) command: 'file2text\n\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy16\temp\<VM NAME>\Snapshots\<VM UUID>.xml\n2097152\n'
[22.01.2019 19:39:10] <10> Info [ReconnectableSocket] Stop confirmation was sent on [c1d84e94-b09b-4039-a8dc-4973e12934fc]. 
[22.01.2019 19:39:10] <23> Error [AP] (65e8) error: The system cannot find the file specified. 
[22.01.2019 19:39:10] <23> Error Failed to open file [\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy16\temp\<VM NAME>\Snapshots\<VM UUID>.xml] in readonly mode.

Solution

There are two methods for correcting this issue depending on your preference:


1. Install an updated version of Veeam Backup & Replication 9.5 U4b:

  1. This issue is resolved in Veeam Backup & Replication 9.5.4.2866
  2. Please download and install the update from https://www.veeam.com/kb2970


2. Change snapshot path in VM configuration manually:

  1. Connect to the Hyper-V host and go to VM Configuration of VM in question;
  2. Go to Checkpoints tab and choose ‘Browse…’ underneath the snapshot path;
  3. Update the path.
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