This is the numeric error code returned by the last remote invocation this slot's FSM made to the blade's management controller (CIMC). For this chassis slot's endpoint for whatever blade currently occupies it, fsmRmtInvErrCode is the field to check when a workflow stalls specifically because the blade's own controller rejected or failed to answer a request, as opposed to a fabric interconnect-side problem. A nonzero value here alongside a stalled fsmProgr would point an admin at the CIMC on the blade in this slot rather than at the fabric interconnect.