After updating to 13.1.1.18, three VMs are showing an “Unable to connect to guest OS” error

[homerjs]

Case #08217063
Only 3 VMs are affected; the others using Guest Processing are fine.
A new installation of the backup server didn't help either.


31.08.2026 12:10:20 Failed : Failed to prepare guest for hot backup. Error: Failed to connect to the guest OS. [Failed to connect to guest agent. Errors: 'Cannot connect to remote SCM database. Machine: [fe80:52d9:b13:7a0a%10]. Requested rights: [0x80000000]. Win32 error:Der RPC-Server ist nicht verfügbar. Code: 1722 Cannot connect to remote SCM database. Machine: [192.168.1.205]. Requested rights: [0x80000000]. Win32 error:Der RPC-Server ist nicht verfügbar. Code: 1722 ']

Is anyone else having these problems?

[david.domask]

Hi homerjs,

Please continue with Support on this; as noted in the forum rules and when you create a topic, only create topics on technical issues after the conclusion to a Support Case. I understand you're hoping someone else has a solution for you, but we cannot meaningfully troubleshoot technical issues over the forums, and especially with RPC 1722 errors, these tend to be very much so environmental in nature.

P.S. - I would ask you please check the license installed on your environment as based on the case, looks like there are issues processing it. Please ensure it's a current and valid license.

[homerjs]

Hello
i have a NFR Lizenz

[david.domask]

NFR cases are still eligible for Support on a "best-effort" basis.

Regardless of license type, technical issues still must go through Support, the forums must not be used for technical troubleshooting.