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Question by Chocolade · May 18, 2017 at 11:40 PM · c#scripting problemscript.

Why i'm getting UnassignedReferenceException when running the game ?

The script is attached to Main Camera. In the inspector i dragged to the script to target a Cylinder from the Hierarchy. The camera does rotate and when i'm using a break point on the line number 19:

 _direction = (target.position - transform.position).normalized;

target is not null. And it does the rotation. So why i'm getting this exception ?

This is the exception message:

UnassignedReferenceException: The variable target of LookAtCamera has not been assigned. You probably need to assign the target variable of the LookAtCamera script in the inspector. UnityEngine.Transform.get_position () (at C:/buildslave/unity/build/artifacts/generated/common/runtime/TransformBindings.gen.cs:26) LookAtCamera.Update () (at Assets/MyScripts/LookAtCamera.cs:19)

This is the script:

     using System.Collections;
     using System.Collections.Generic;
     using UnityEngine;
     
     public class LookAtCamera : MonoBehaviour {
     
         //values that will be set in the Inspector
         public Transform target;
         public float RotationSpeed;
     
         //values for internal use
         private Quaternion _lookRotation;
         private Vector3 _direction;
     
         // Update is called once per frame
         void Update()
         {
             //find the vector pointing from our position to the target
             _direction = (target.position - transform.position).normalized;
     
             //create the rotation we need to be in to look at the target
             _lookRotation = Quaternion.LookRotation(_direction);
     
             //rotate us over time according to speed until we are in the required rotation
             transform.rotation = Quaternion.Slerp(transform.rotation, _lookRotation, Time.deltaTime * RotationSpeed);
         }
     }
 
 

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Best Answer

Answer by bobisgod234 · May 19, 2017 at 12:14 AM

Are you sure you don't have multiple instances of the script in the scene? try putting

 t:LookAtCamera

Into the Hierarchy search field. This will highlight all objects with a LookAtCamera component attached.

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avatar image Chocolade · May 19, 2017 at 06:50 AM 0
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Right that was the problem. Thanks.

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