Instantiate on collision warning

Unity Engine
1

I am getting the following warning when trying to instantiate a prefab upon a collision with an object:
“Number of parameter does not match expected count.”
Here is the script:

function OnCollisionEnter (object) {
	if (object.transform.name == "proj(Clone)") {
			var contact = object.contacts[0];
    		var rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
    		var pos = contact.point;
    		Instantiate(prefab1, pos, rot);
	}
}

Any ideas what’s going wrong?

2

the OnCollisionEnter function wants to be passed a Collision, not a GameObject.

Replace the first two lines with:

function OnCollisionEnter (collision : Collision) { 
 if (collision.collider.gameObject.name == "proj(Clone)") {
3

Great. Thanks Yoggy!