FSX Getting Exceptions 9 and 29

[Troublemaker]

I got a problem with the key event failures. Below the relevant piece of the c# code.
By clicking the button the electrical failure occurs and everything is well, but if I click it again I get exception 9 and exception 29 (Duplicate ID and Duplicate Event ID).
I think I have mistunderstood something here. Maybe somebody could have a look and give me some advice how to solve it...

// Enums
  enum FAILURES
  {
  KEY_TOGGLE_ELECTRICAL_FAILURE,
  KEY_TOGGLE_VACUUM_FAILURE
  }

  enum NOTIFICATION_GROUPS
  {
  GROUP_0
  }

// Eventhandler
  void simconn_OnRecvEvent(SimConnect sender, SIMCONNECT_RECV_EVENT data)
  {
  switch (data.uEventID)
  {
  case (uint)FAILURES.KEY_TOGGLE_ELECTRICAL_FAILURE:
  MessageBox.Show("ELECTRICAL");
  break;
  case (uint)FAILURES.KEY_TOGGLE_VACUUM_FAILURE:
  MessageBox.Show("VACUUM");
  break;
  }
  }

// Raise event
private void TriggerFailureEvent(FAILURES failureEvent)
  {
  string eventName = null;
  switch (failureEvent)
  {
  case FAILURES.KEY_TOGGLE_ELECTRICAL_FAILURE:
  eventName = "TOGGLE_ELECTRICAL_FAILURE";
  break;
  case FAILURES.KEY_TOGGLE_VACUUM_FAILURE:
  eventName = "TOGGLE_VACUUM_FAILURE";
  break;
  }
  simconn.MapClientEventToSimEvent(failureEvent, eventName);
  simconn.AddClientEventToNotificationGroup(NOTIFICATION_GROUPS.GROUP_0, failureEvent, true);
  simconn.SetNotificationGroupPriority(NOTIFICATION_GROUPS.GROUP_0, SimConnect.SIMCONNECT_GROUP_PRIORITY_HIGHEST);
  simconn.TransmitClientEvent(SimConnect.SIMCONNECT_OBJECT_ID_USER, failureEvent, 0, NOTIFICATION_GROUPS.GROUP_0, SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
  }

// Button click
  private void TestFailure_Click(object sender, EventArgs e)
  {
  // DEBUGGING FUNCTION
  TriggerFailureEvent(FAILURES.KEY_TOGGLE_ELECTRICAL_FAILURE);
  }

 

[Troublemaker]

Ok, found it out by myself...

I have to map the event just once, not everytime when it's being triggered.

 

[lordofwings]

If you map multiple times you get exception 29 I think (DUPLICATE) so you do it just once when the application initializes for example. However, prior to closing the connection with SimConnect you should also disconnect the event from the group either with ClearGroupEvents or the other method that removes a single event from a group. Otherwise if you disconnect and reconnect to the same FLight Simulator session (i.e. you have not quit the simulator) then you will also get the duplicate exception.