NullReferenceException: my_Text.text = "whatever" + var.ToString(); not working

Questions & Answers
1

My Script:

#pragma strict

import UnityEngine.UI;
import UnityEngine.Networking;

var MaxHealth = 100;
var Health : int;
var Healthbar : UnityEngine.UI.Scrollbar;
var Hungerbar : UnityEngine.UI.Scrollbar;
var Thirstbar : UnityEngine.UI.Scrollbar;
var MaxHunger = 100;
var MaxThirst = 100;
var Thirst : int;
var Hunger : int;
var thirstIsZero = false;
var hungerIsZero = false;
public static var zombieskilled = 0;
var zombieskilledtext : Text;

@SerializeField
var dontDrawLayer : String = "DontDraw";

@SerializeField
var PlayerGraphics : GameObject;

function Start ()
{
    Healthbar = GameObject.Find("HealthBar").GetComponent(Scrollbar);
    Hungerbar = GameObject.Find("HungerBar").GetComponent(Scrollbar);
    Thirstbar = GameObject.Find("ThirstBar").GetComponent(Scrollbar);
    Healthbar.size = 1;
    Health = MaxHealth;
    Hungerbar.size = 1;
    Thirstbar.size = 1;
    Hunger = MaxHunger;
    Thirst = MaxThirst;
    zombieskilledtext = GameObject.Find("Zombieskilled").GetComponent(Text);
}

function Update ()
{
    zombieskilledtext.text = "Zombies Killed: " + zombieskilled.ToString ();
    Hungerbar.size = Hunger / 100f;
    Thirstbar.size = Thirst / 100f;
    if(Hunger <= 0)
    {
        Debug.Log("Player Dying");
        hunger();
    }
    if(Thirst <= 0)
    {
        Debug.Log("Player Dying");
        hunger();
    }
    if(RespawnMenuV2.playerIsRespawned == true)
    {
        Health = MaxHealth;
        Hunger = MaxHunger;
        Thirst = MaxThirst;
        RespawnMenuV2.playerIsRespawned = false;
    }
    //if(!isLocalPlayer)
    //{
        //setLayerRecursively(PlayerGraphics, LayerMask.NameToLayer(dontDrawLayer));
    //}
}

function ApplyDammage (TheDammage : int)
    {
        Health -= TheDammage;
        Healthbar.size = Health / 100f;
        if(Health <= 0)
        {
            Dead();
        }
    }

    function Dead()
    {
        RespawnMenuV2.playerIsDead = true; //VERY IMPORTANT! This line was added in tutorial number 19. If you haven't reached that tutorial yet, go ahead and remove it.
        Debug.Log("Player Died");
        Hungerbar.enabled = false;
        Thirstbar.enabled = false;
        Healthbar.enabled = false;
    }

    function hunger()
    {
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
        Health -= 10.0;
        yield WaitForSeconds(5);
    }
    //function SetLayerRecursively ()
        //{
            //var obj : GameObject;
            //var newLayer : int;
            //obj.layer = newLayer;

            //for (var child : Transform in obj.transform)
        //{
                //SetLayerRecursively(child.gameObject, newLayer);
        //}
        //}

The error:
NullReferenceException: Object reference not set to an instance of an object
PlayerStatsV2.Update () (at Assets/Scripts/PlayerStatsV2.js:43)

please tell me how to solve this.

2

@scottsniper77
The problem is most likely that “zombieskilledtext” has not been in the Start function. Try doing this

     if (GameObject.Find("Zombieskilled") && GameObject.Find("Zombieskilled").GetComponent(Text))
     {
         zombieskilledtext = GameObject.Find("Zombieskilled").GetComponent(Text);
     }
     else
     {
        if (GameObject.Find("Zombieskilled"))
        {
            Debug.Log("GameObject.Find(Zombieskilled).GetComponent(Text) == null");
        }
        else
        {
            Debug.Log("GameObject.Find(Zombieskilled) == null");
        }
     }

and this

 function Update ()
 {
     if (zombieskilledtext && zombieskilled)
     {
         zombieskilledtext.text = "Zombies Killed: " + zombieskilled.ToString ();
     }
 }