NullReferenceException: The prefab you want to instantiate is null.

Questions & Answers
1

I have a little problem with instantiate have a code as that ;

    var prefab: Transform;

function Update () {
    if (Input.GetMouseButton(0)) {
        var ray: Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        var hit: RaycastHit;

        if (Physics.Raycast(ray, hit)) {
            Instantiate(prefab, hit.point, Quaternion.identity);
        } 
    }
}

I have a Cube as prefab. When i play and clicked to any area i take this error.

NullReferenceException: The prefab you want to instantiate is null. UnityEngine.Object.Instantiate (UnityEngine.Object original, Vector3 position, Quaternion rotation) NewBehaviourScript 1.Update () (at Assets\NewBehaviourScript 1.js:12)

How can i insert my prefab where my clicked ?

Can you help me ?

3

I've seen this a few times when you change the type used for the variable when you already had an object assigned in the inspector

Try set the prefab variable to another object in the inspector (or set it to None), then add your original object back in - it should add it back in properly

2

Make sure your prefab is actually assigned in the inspector.