Within the local node, error recovery for a half-duplex application (as specified by byte 7 bit 2 of the BIND) is assumed to be the responsibility of the host. However, the application must be aware of the fact that an error recovery state has been entered to obey the direction protocol.
When an application using half-duplex protocols (flip-flop or contention) receives a negative response to an inbound chain that it sent that does not refer to a race, it must assume receive state. The sense codes used for race conditions that do not require the transition to receive state are:
| 0x080B | Bracket race error |
| 0x081B | Receiver in transmit mode |