Hyper-V backups are failing after installing Veeam B&R 9.5 Update 4 (Error: The system cannot find the file specified)

Challenge

After installing Veeam Backup & Replication 9.5 Update 4, Hyper-V backup without application-aware processing may fail with this error: 

Cause

This issue is caused by snapshot path in VM configuration being different from the actual path on a file system in terms of symbols capitalization.
 

Solution

There are two ways to resolve the issue:
1. Change snapshot path in VM configuration.

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

2. A hotfix for Veeam Backup & Replication 9.5 Update 4 (build 9.5.4.2615) is available. To install the hotfix:

• Make sure that no jobs are running and then stop Veeam services;
• On Veeam server navigate to C:\Program Files\Veeam\Backup and Replication\Backup, locate the original Veeam.Backup.Core.dll, rename it to “Veeam.Backup.Core_old.dll” and place the file from hotfix to the same folder;
• Start all Veeam services

More Information

In order to download the fix, please, use this link