This object reports the current error status of a card's packet bus interface, with values covering conditions like invalidParm, socketNotOpened, ackWaitTimeout, hwNakRcvd, noMemory, txBusTimeOut, clkVanished, and many other specific fault codes, defaulting to noError. Admins check this to diagnose the specific nature of a packet bus communication problem on a given card, beyond just knowing timeouts are occurring. A value of clkVanished(37) would tell the admin this card lost its packet bus clock reference, a more specific diagnosis than a generic timeout.