This Gauge32 is the error code returned from a remote invocation made while executing this finite-state-machine workflow. It matters on the finite-state-machine record UCS Manager runs while it discovers, acknowledges, or brings up that internal server-side backplane link because a nonzero value here means the failure originated on the far end (e.g. the IOM or fabric interconnect responding to a management call), not in UCS Manager's own logic. A nonzero rmtErrCode on this link alongside an fsmStatus of fail gives an admin a specific code to look up rather than guessing at the cause.