This gauge holds the numeric error code from a remote invocation made while this core-dump FSM was running, part of the workflow that carries out the async workflow UCS Manager runs to manage a core-dump file, such as collecting or clearing it. An admin treats a non-zero value as proof that a remote step of this operation failed, and looks up the code to learn the specific cause. For example, if the remote side of the workflow tracked by this core-dump FSM rejects a request, that peer's error code shows up here for UCS Manager to record.