WWW - Url change in coroutine is not working?

Unity Engine
1

I use this WWW script: Unity - Scripting API: WWW

It’s working. But when I change the code to this:

    using UnityEngine;
    using System.Collections;
   
    public class ExampleClass : MonoBehaviour {
        public string url = "http://images.earthcam.com/ec_metros/ourcams/fridays.jpg";
               
    void Start () {

        StartCoroutine (Co ());
       
    }

        IEnumerator Co() {

            // *** THIS IS THE NEW LINE ***
            url = "http://NEW URL";
               
            WWW www = new WWW(url);
            yield return www;
               
            Renderer renderer = GetComponent<Renderer>();
            renderer.material.mainTexture = www.texture;
        }
    }

It’s not working. Why?

I printed the new URL in the console and tested it. The new url works.

So, the new url change in the coroutine is not working.

2

Your example works fine for me.
What do you mean by “not working”. What happens?
Did you maybe put this code in a script named something other than “ExampleClass” ?