If you see the above error when your “Veeam Agent Backup” jobs try to run, then you need to make a change to your Veeam database (on the Veeam server).

This is perfectly mentioned in this KB4421 – but if you are using Microsoft SQL (embedded with Veeam) and have no SQL management studio installed – here is a quick guide on how to fix the above problem – just using OSQL.exe (included with SQL embedded)

Locate the OSQL.EXE executable – I found it here: “C:\Program Files\Microsoft SQL Server\110\Tools\Binn”

Using command prompt (cmd.exe) run the executable with:

osql.exe -E -S <SERVERNAME>\<DATABASE>

Replace SERVERNAME and the database name (ex. “osql.exe -E -SVEEAMBACKUP\VEEAMSQL2012”). When OSQL prompt is ready for input type the following:

use VeeamBackup;
go
update dbo.[Backup.Model.EpHosts] set os_version='0.0' where os_version=''
go
exit

That should be it – try to run your “Veeam Agent Backups” again!

Ill like to highlight that after updating “Veeam Backup and Replication” to “version 9.5 update 3a” you might start to see warnings like this in your Veeam status reports:

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