This string ("fsmRmtInvErrDescr") holds the human-readable description accompanying the FsmRmtInvErrCode for this IOM's FSM remote invocation. When an IOM's FSM workflow fails on a remote call, an admin reads this description first since it usually states the actual reason, such as a communication timeout to the module, in plain terms, faster than decoding the numeric error code alone. It might read something like "Timed out communicating with peer" when the FSM could not get a response from this specific IOM in time.