trying to run a co routine function gets error

Questions & Answers
1

am spawning an object at some random time interval. am using co-routines for that. it shows a error message which i couldn’t understand. can some one help me what is the error about. thanks in advance.

using UnityEngine;
using System.Collections;

public class enemySpawner_5 : MonoBehaviour {

	public GameObject[] enemies_5;
	bool isSpawning = false;
	public int minTime = 2;
	public int maxTime = 4;

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {

		//We only want to spawn one at a time, so make sure we're not already making that call
		if(!isSpawning)
		{
			//making a condition that we can spawn
			isSpawning = true;

			int enemyIndex = Random.Range(0, enemies_5.Length);
			StartCoroutine(spawnObject(enemyIndex, Random.Range(minTime, maxTime)));

		}
	
	}

	IEnumerator spawnObject( int index, int seconds)
	{
		//instantiating position
		Vector3 position = new Vector3(-1.355466f, 7f, -0.5f);

		//instantiating the object
		Instantiate(enemies_5[index], position, transform.rotation);

		//we have spawned so we could start another spawn
		isSpawning = false;
	}
}
2

The problem here is that your Coroutine is not returning/yielding any values here.Try like this

using UnityEngine;
using System.Collections;
 
public class enemySpawner_5 : MonoBehaviour 
{ 
    public GameObject[] enemies_5;
    bool isSpawning = false;
    public int minTime = 2;
    public int maxTime = 4;
 
    // Use this for initialization
    void Start () 
    {
 
    }
 
    // Update is called once per frame
    void Update ()
    { 
        //We only want to spawn one at a time, so make sure we're not already making that call
        if(!isSpawning)
        { 
            int enemyIndex = Random.Range(0, enemies_5.Length);
            StartCoroutine(spawnObject(enemyIndex, Random.Range(minTime, maxTime))); 

            //Spawn only once
            isSpawning = true;
        } 
    }
 
    IEnumerator spawnObject( int index, int seconds)
    {
        //instantiating position
        Vector3 position = new Vector3(-1.355466f, 7f, -0.5f);
 
        //instantiating the object
        Instantiate(enemies_5[index], position, transform.rotation);

        //Wait for the random seconds
        yield return new WaitForSeconds(seconds);
 
        //we have spawned so we could start another spawn
        isSpawning = false;
    }
}