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This question was closed Aug 31, 2018 at 11:42 PM by JVene for the following reason:

Comments state the problem was solved

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1
Question by RogueMacro · Jul 16, 2018 at 07:15 AM · c#unity5nullreferenceexceptioncarstandard-assets

Car from Unity's standard assets giving me of null reference errors

I imported the unity standard assets vehicles to use the car it provides (In C#). I attached a script that makes it possible to enter the car and a box collider, but the car's audio and controller is spamming me with null reference errors. I haven't done anything to change the scripts that are returning this errors, so I don't understand. In the CarController script, I have noticed that the errors come from a variable called 'm_Rigidbody' that is set in the Start function like this:

 // Took away the rest of the code to make it clearer
 private Rigidbody m_Rigidbody;
 
 private void Start()
 {
     m_Rigidbody = GetComponent<Rigidbody>();
 }

Here are the errors:

 #1 Error
 NullReferenceException: Object reference not set to an instance of an object
 UnityStandardAssets.Vehicles.Car.CarController.get_CurrentSpeed () (at Assets/Standard Assets/Vehicles/Car/Scripts/CarController.cs:53)
 UnityStandardAssets.Vehicles.Car.CarController.ApplyDrive (Single accel, Single footbrake) (at Assets/Standard Assets/Vehicles/Car/Scripts/CarController.cs:224)
 UnityStandardAssets.Vehicles.Car.CarController.Move (Single steering, Single accel, Single footbrake, Single handbrake) (at Assets/Standard Assets/Vehicles/Car/Scripts/CarController.cs:153)
 UnityStandardAssets.Vehicles.Car.CarUserControl.FixedUpdate () (at Assets/Standard Assets/Vehicles/Car/Scripts/CarUserControl.cs:27)


 #2 Error
 NullReferenceException: Object reference not set to an instance of an object
 UnityStandardAssets.Vehicles.Car.CarController.SteerHelper () (at Assets/Standard Assets/Vehicles/Car/Scripts/CarController.cs:252)
 UnityStandardAssets.Vehicles.Car.CarController.Move (Single steering, Single accel, Single footbrake, Single handbrake) (at Assets/Standard Assets/Vehicles/Car/Scripts/CarController.cs:152)
 UnityStandardAssets.Vehicles.Car.CarUserControl.FixedUpdate () (at Assets/Standard Assets/Vehicles/Car/Scripts/CarUserControl.cs:27)


 #3 Error
 NullReferenceException: Object reference not set to an instance of an object
 UnityStandardAssets.Vehicles.Car.CarAudio.Update () (at Assets/Standard Assets/Vehicles/Car/Scripts/CarAudio.cs:90)
 
 




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avatar image spencore · Aug 29, 2018 at 02:13 AM 0
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same here.

avatar image NoDumbQuestion · Aug 29, 2018 at 04:25 AM 0
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Reimport the asset. Some prefab from asset have missing script reference

avatar image RogueMacro · Aug 30, 2018 at 03:50 PM 0
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thanks that fixed it

avatar image Aindi · Mar 07, 2020 at 06:21 PM 0
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Set the Rigidbody component reference to the m_Rigidbody in the Awake method. That will resolve the error. Since Awake method is called whether GameObject is active/inactive.

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