async Task HandleTCS(CancelCarrierRequest tx) {
bool isUnknown = tx.Carrier.Id == "(Unknown)";
var s3f18 = await EAP.SendAsync(new SecsMessage(3, 17, "CancelCarrier",
Item.L(
Item.U4(0),
Item.A(isUnknown?"CancelCarrierAtPort":"CancelCarrier"),
Item.A(isUnknown?string.Empty:tx.Carrier.Id),
Item.U1(GetPortNo(tx.Carrier.LoadPortId)),
Item.L())));
byte returnCode = (byte)s3f18.SecsItem.Items[0];
if (returnCode != 0 && returnCode != 4)
throw new ScenarioException("CancelCarrier failed. ");
}
