Sdk-doctor error 129 (unknown command)

Trying to diagnose communication problems with a Windows 2.2.0 cluster (yes, it is no longer supported) running in AWS. sdk-doctor reports “Failed to fetch configuration via cccp (status: 129)” which equates to “StatusUnknownCommand”. I can see from the packet sniffer on the node that this code is indeed being returned. Is is just the case that this version is so old that it doesn’t support the"get cluster config" command?

This is because the cluster does not support new bootstrap protocol. So you can assume that sdk-doctor does not support this version.

According to support policy that version reached its end of life more than two years ago. First commit to sdk-doctor was created only one year ago.

*sigh. Thank you for the response - I suspected as much.