NullReferenceException

Questions & Answers
1

i really don’t understand why this error come to me so much times x.x
i could handle it 2-3 times, but now i can’t handle it again… although i have build the exact same code with the last one…

so my code is guiSchool3.js (This script attached to Main Camera on Scene “A”)

#pragma strict
var script : guiSchool2;
var choice : int;
script = GetComponent(guiSchool2);
choice = script.flag;

var tekstur1 : Texture;
function Start () {
	
		
}
function OnGUI(){
	
	if(choice==1){	
		GUI.DrawTexture(Rect(Screen.width*0.125,Screen.height*0.125,Screen.width*0.75,Screen.height*0.75),tekstur1);
	}
	else if (choice==2){
		
	}
}

and here’s guiSchool2! (i delete the part that not linked by the error)(This Script attached to Main Camera on Scene “B”)

#pragma strict

var flag: int;

function OnGUI (){

	GUI.DrawTexture(Rect(posbg_w,posbg_h,bg_w,bg_h),bg);
	if(GUI.Button(Rect(pos_b1w,pos_b1h,b_width,b_height)," ",button_perkalian)){
		flag = 1;
		Application.LoadLevel("School3");
	}
	if(GUI.Button(Rect(pos_b1w,pos_b2h,b_width,b_height)," ",button_luas)){
		flag = 2;
		Application.LoadLevel("School3");
	}
	if(GUI.Button(Rect(pos_b1w,pos_b3h,b_width,b_height)," ",button_satuan)){
		flag = 3;
		Application.LoadLevel("School3");
	}
}

and the console throw me this exception

NullReferenceException: Object reference not set to an instance of an object
guiSchool3.Main () (at Assets/Scripts/School/guiSchool3.js:5)

i believe i’ve done the exact same with the code before… but it’s still wrong… why?

2

I’m pretty sure you should assign “script” and “choice” in the start function. Unless you already fixed it.

function Start() {
    script = GetComponent(guiSchool2);
    choice = script.flag;
}