Coroutine only partially executing

Question

I have a Coroutine that I use to pull and spawn an enemy in my game. This coroutine works perfectly fine, with the exception of the very first call. I am fairly certain this is because I am probably loading something before it is ready, but I don't know enough to know where.

This is my code (Note the Debug.Log entries). I have removed whatever I think is irrelevant code.

1. EnemyHandler.cs

   public class EnemyHandler : MonoBehaviour
   {
   public int mob_id;
   IEnumerator LoadMob()
   {
       Debug.Log("Checkpoint 1");
   
       WWWForm form = new WWWForm();
       form.AddField("mob_id",mob_id);
       WWW www = new WWW("my-url-here",form);
       yield return www;
       Debug.Log("@@@@@@ Checkpoint 2 @@@@@@");
       string[] webResults = www.text.Split('\t');
   
       int returncode = int.Parse(webResults[0]);
   
       switch (returncode)
       {
           case 0:
           //Mob Loaded Successfully
           //Mob variables are set here
           Debug.Log("@@@@@@ Checkpoint 3 @@@@@@");
           break;
   
           default:
           Debug.Log("Error!");
           break;
       }
   
   }
   
    public void CallMobLoad(int requested_mob_id)
    {
        mob_id = requested_mob_id;
        StartCoroutine(LoadMob());
        Debug.Log("Coroutine called! Checkpoint 0");
    }
   }
   

2.GameManager.cs (This is my primary class)

public class GameManager : MonoBehaviour
{
    public GameObject spawnManager;
    public static EnemyHandler thisenemy;

    void Start()
    {
     thisenemy = spawnManager.AddComponent<EnemyHandler>();
     thisenemy.CallMobLoad(1);
    }
}

CallMobLoad is called once at Start, and every time a monster dies. It never works when called in Start(), but always works after that.

Furthermore, the first call only calls the first 2 Debug.Logs "Checkpoint 0" and "Checkpoint 1", none of the other checkpoints are hit. Every subsequent call works correctly and hits all checkpoints.

I really want to learn how/why this happens, Any help is greatly appreciated!

EDIT: I have fixed this by turning Start into an IEnumerator, and adding a yield return to thisenemy.CallMobLoad(mobloadtemp);

Still not sure if this is the best way to do this, so please do advise.

Answer 1

I have fixed this by turning the function I use to initialize the Coroutine into an IEnumerator, and adding a yield return to the call.

(The same effect can be achieved by changing Start from void to IEnumerator, if the Coroutine is initialized in Start).

I don't know if this is the best solution, but this solves the problem completely.