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Question by diablia · Feb 22, 2014 at 11:07 AM · c#cameranullreferenceexception

NullRefenceException error

So I get "NullReferenceException: Object reference not set to an instance of an object" at this line camera3rd.enabled=false;. Can't figure out what's wrong

   using UnityEngine;
     using System.Collections;
     public class CameraSwitch : MonoBehaviour {
     
         public SmoothFollow camera3rd;
     
         
         public Transform target;
         public float time;
     
         
         void Start () {
     
             // Auto setup smoothfollow to a cameraswitch script
             camera3rd = gameObject.GetComponent<SmoothFollow>() ;
 //disabling this script
             camera3rd.enabled=false;
         }
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avatar image Jamora · Feb 22, 2014 at 12:44 PM 0
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Have a look at my explanation on null reference exceptions and how to fix them. You can find it here.

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Answer by mattyman174 · Feb 22, 2014 at 11:11 AM

 public SmoothFollow camera3rd;

This is an uninitialized variable, did you forget to add a SmoothFollow script component to the GameObject?

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avatar image diablia · Feb 22, 2014 at 12:03 PM 0
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nope. these 2 scripts are added to one object.

avatar image mattyman174 · Feb 22, 2014 at 12:16 PM 0
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Are you positive. I have a test script setup exactly like yours and i can compile and run it fine, it does as expected.

Can you copy and paste the exact error message please.

avatar image diablia · Feb 22, 2014 at 12:59 PM 0
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NullReferenceException: Object reference not set to an instance of an object CameraSwitch.Start () (at Assets/SwitchCameras/CameraSwitch.cs:18)

avatar image RudyTheDev · Feb 22, 2014 at 01:00 PM 0
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@diablia: I guess then you have drag&dropped it correctly in the inspector, but when you call gameObject.GetComponent< SmoothFollow >(), it doesn't find it and "resets" the camera3rd variable to null?

avatar image mattyman174 · Feb 22, 2014 at 01:02 PM 0
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Double check that you do have both scripts attached to the same GameObject as components.

You should have at least a CameraSwitch Script Component and an SmoothFollow Script Component attached to the GameObject.

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