This holds the numeric error code returned by a remote invocation the IOM's FSM made to another managed endpoint, such as the peer fabric interconnect, when that call failed. A nonzero value here means the workflow's remote step errored out, and the code can be looked up against Cisco's FSM error reference to identify the specific failure. For example, a specific nonzero code combined with a stalled fsmProgr value would tell an admin the IOM's firmware activation failed because a call to the standby fabric interconnect timed out.