"listen tcp: lookup tcp/60464: getaddrinfow: The specified class was not found." on fresh start

I’ve just encountered this error message.

This happened right at the very first launch of Syncthing with no pre-existing configuration. The environment is Windows 7 x86 running in a VirtualBox VM.

Have you got any idea what the error is about, and also whether this is something serious or rather something that can be ignored with no repercussions?

Edit: The error re-occurs on each subsequent start of Syncthing. I suspect this may have something to do with Windows 7, as I’ve never seen the error in newer versions of Windows that I normally use on a daily basis. I don’t remember seeing such errors previously in the exact same OS though, e.g. a few months ago. This installation of Windows 7 is almost entirely vanilla with no specialised configuration, especially regarding networking and such.

:man_shrugging:

IPv6?

Not really sure. I haven’t changed any networking-related configuration either in Windows 7 or in VirtualBox. Everything just runs on the defaults.

VirtualBox uses its default network settings for the VM:

image

and Windows 7 reports the following:

   Link-local IPv6 Address . . . . . : fe80::40c7:6324:e153:bfc2%11
   IPv4 Address. . . . . . . . . . . : 10.0.2.15
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 10.0.2.2

When actually connected, Syncthing on other devices reports the VM’s IP as:

where 10.0.0.51 is the actual IP address of the host computer, on which the VM is currently running.