Cant remove bullets after a set amount of time

I am trying to remove an bullet after a set amount of time but all i get is the error saying it cant delete it due to data loss.

i am using the code

if (timer >= 4)
{
     Destroy(Fireball.gameObject);
}

is there a way to remove the bullet that was fired after the set amount of time.

Based upon your confirmation that Fireball is a prefab, I think the problem is that you’re attempting to use the prefab directly.

In general, your code should be something like this:

// Inside the class - local variable, public access
public GameObject Fireball; // In the editor window, drop the Fireball prefab to this

// In a method ...
var fireballInstance = Instantiate(this.Fireball);

//Later, when you're done with it and want it gone
Destroy(fireballInstance);

You can’t destroy the prefab - and you shouldn’t be trying to use a prefab directly. If you placed it in your scene - so that it’s an instance, be sure to drag the Instance (from the scene graph) to the script reference, not the Prefab (from the project explorer) to the script reference.

AutoDestroy.js :

var ExpireTime : float;

function Start(){
    yield WaitForSeconds(ExpireTime);
    {
        Destroy(gameObject);
    }
}