Problem naming an instantiated gameobject

First, I’m really sorry, I don’t speak english very well, and I’m learning C# by myself so it’s a little bit hard for me.

What my script do is to instantiate a new Gameobject at the center of each poly of an existing gameobject (the one which contains my script). It works fine, but when I try to name my new gameobject I get a NullReferenceException.

Here is my script, I hope he is easy to read :

using UnityEngine;
using System.Collections;

public class FireInitialize : MonoBehaviour {
	//the prefab I want to be instantiated
	public GameObject FireSensor;
	GameObject FireSensors;

	// Use this for initialization
	void Start () {
		Mesh goMesh = GetComponent<MeshFilter> ().mesh;

		//explore all polygons of my mesh
		for(int i=0; (i+2)<goMesh.triangles.Length; i+=3){

			//Find the center of the polygon i'm working on (bar is for barycentre, french name for centroid)
			Vector3 Bar1= goMesh.vertices[goMesh.triangles*];*
  •  	Vector3 Bar2= goMesh.vertices[goMesh.triangles[i+1]];*
  •  	Vector3 Bar3= goMesh.vertices[goMesh.triangles[i+2]];*
  •  	Vector3 Bar = new Vector3((Bar1.x+Bar2.x+Bar3.x)/3,* 
  •  	               (Bar1.y+Bar2.y+Bar3.y)/3,* 
  •  	               (Bar1.z+Bar2.z+Bar3.z)/3);*
  •  	//Instantiate my object in the center of the poly, and assign to his name a new number to differentiate it to the other one (will be used after to interact with my polys)*
  •  	string SensorNumber = i.ToString();*
  •  	FireSensors = Instantiate(FireSensor.transform, Bar, transform.rotation) as GameObject;*
  •  }*
  • }*
    Thanks a lot for your help

Try this, it may or may not work

FireSensors = (GameObject)Instantiate(FireSensor, Bar, transform.rotation);"FireSensor"+SensorNumber;

I’m not sure but the .transform after FireSensor may be messing it up and I changed the line to make it a bit shorter.