This gauge holds the numeric error code returned by a remote invocation that UCS Manager made as part of the FSM running on this log-control endpoint, which holds the overall internal debug-logging configuration for a UCS endpoint. An admin uses a non-zero value here to identify that the remote step of the workflow behind this log-control endpoint failed, and to look up what that specific error code means. For example, if the operation behind this log-control endpoint depends on a remote peer and that peer rejects the call, this field surfaces the peer's error code back to UCS Manager.