Error Coroutine couldn't be started!

Questions & Answers
1

My script has been working fine for the past few weeks but suddenly I get a console error when I run it and the message I want to display on the screen isn’t displayed.

Here is my script:

using UnityEngine;
using System.Collections;

public class CutSceneLight1 : MonoBehaviour {
	
	public int wait;
	public GUIStyle text;
	string message = " ";
	
	
	//GUI Box
	void OnGUI() {
		GUI.Label((new Rect(600,400,200,200)),message ,text);
	}
	
	//Displaying text
	IEnumerator OnTriggerEnter(Collider otherObjective){
		if (otherObjective.tag == "Player") {
			
			message = "Message here";
			StartCoroutine(message);
			yield return new WaitForSeconds(wait);
			message = "Another message here";

What I want to happen is for the player to cross the collider which is set as trigger and then the messages play.

Please help me I need to fix this as soon as possible.
Thanks!

3

Why not start the coroutine with the Trigger/collider?

void OnTriggerEnter(Collider otherObjective)
{
if(otherObjective.tag == "Player")
{
StartCoroutine(Messanger());
}
}

private IEnumerator Messanger()
{
//do your messages stuff here...
message = "Message here";
yield return new WaitForSeconds(wait);
message = "Another message here";
}

Might have some typos!

Here is a small textoutputmanager i wrote for my current project.
it will show for 3 seconds a specific message and will disable after that.

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

public class TextOutPutManager : MonoBehaviour {

	//panel ggf.
	public GameObject textPanel;
	//text field output
	public Text MessageOutput;
	//string message
	public string message = "";//this is the message to show
	//string incoming message
	public string incomingMessage = "this is the message send from outside";

	//bool showtext
	public bool showtext = false;

	// Use this for initialization
	void Start () 
	{
		textPanel.SetActive(false);
	}
	
	// Update is called once per frame
	void Update () 
	{
		if(showtext)
		{
			StartCoroutine("Timer");
		}
		else
		{
			StopCoroutine("Timer");
		}


	}

	private IEnumerator Timer()
	{
		message = incomingMessage;
		MessageOutput.text = message;
		textPanel.SetActive(true);
		yield return new WaitForSeconds (3);

		message = "";
		MessageOutput.text = message;
		textPanel.SetActive(false);
		showtext = false;
	}
}
2

Not entirely sure what you’re trying to accomplish with the messages, but you are trying to call a string as a function? (“message” is a string).

Also, OnTriggerEnter should be a void. I imagine you want to apply StartCoroutine(displayMessage(message)); to an IEnumerator displayMessage(string msg); function?

4

Generally, this error comes up when you start a coroutine that doesn’t exist. Double check the name from that message variable.