Error: "A client which was not in the connected player list disconnected. ???"

[KdRWaylander]

Hi,

I have two locally connected applications, one being the server, the other being the client. It always worked with my differents builds but this time I have the strangest error:

I don’t have any messages in the console saying that a player has connected/disconnected, I only have “Server created” and this error. I should say that both applications works perfectly independently …

Here’s my code:

Server:

using UnityEngine;
using System.Collections;
using System.Diagnostics;
using UnityEngine.UI;

public class ServerPropsMVR : MonoBehaviour {
	/* VARIABLES */
	int nbClient = 5;
	int nbPort = 25000;
	bool useNat = false;

	public Text connexionStatusText;
	int playerCount;

	/* INITIALISATION */
	void Start (){
		playerCount = 0;

		Network.InitializeServer (nbClient,nbPort,useNat);

		Process.Start("MVR_Oculus_AsClient");
	}

	/* MESSAGES */
	void OnServerInitialized () {
		UnityEngine.Debug.Log ("Server created");
	}

	void OnPlayerConnected () {
		UnityEngine.Debug.Log ("Client connected");
		playerCount++;

		if (playerCount > 0) {
			connexionStatusText.text = "Connected";
			connexionStatusText.color = Color.green;
		}
	}

	void OnPlayerDisconnected () {
		UnityEngine.Debug.Log ("Client disconnected");
		playerCount--;

		if (playerCount < 1) {
			connexionStatusText.text = "Disconnected";
			connexionStatusText.color = Color.red;
		}
	}
}

Client:

using UnityEngine;
using System.Collections;

public class ClientPropsMVR : MonoBehaviour {
	// Server properties
	string serverIP = "127.0.0.1";
	int serverPort = 25000;

	/* INITIALISATION */
	void Update(){
		if (Network.peerType == NetworkPeerType.Disconnected)
			Network.Connect(serverIP, serverPort);
	}

	/* MESSAGES */
	void OnConnectedToServer () {
		Debug.Log ("Connected to server");
	}

	void OnApplicationQuit () {
		Network.Disconnect (200);
	}
}

[Cheryl_Dwyer]

Well, this is quite an old post, and you’ve probably figured it out already, but I’ll write this anyway.
This exception, as the error states, is thrown when a player who’s not in the connected player list disconnects - so the question is why that player was not in the list. From my experience, this occurs when a client connects and then disconnects again in the same frame (probably before the server has time to add them), so check any methods called once a frame (like Update() and so on) for Network.Disconnect() or Network.CloseConnection(). Also, you don’t need to keep track of the player count yourself. Unity keeps a list of all the connected NetworkPlayers, so you can get the number of players by checking the list’s length : Network.connections.Length. Hope this helped!