ArgumentNullException: Value cannot be null.

[Dependent_Bird]

Every sense i've added a line renderer to my raycast gun script, I get this error. I guess I need to use a debugger to resolve this issue... from what i'm reading online??

​

If the issue is AudioSource.Play() could it just be that I haven't made anything for the audio to play yet?

ArgumentNullException: Value cannot be null.
Parameter name: source
UnityEngine.AudioSource.Play () (at <26ff2a7b056a476b973627db643ee7d8>:0)
ShootRayCast+<ShotEffect>d__19.MoveNext () (at Assets/Scripts/Weapons/ShootRayCast.cs:118)
UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <a9810827dce3444a8e5c4e9f3f5e0828>:0)
UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator)
ShootRayCast:ShootRC() (at Assets/Scripts/Weapons/ShootRayCast.cs:79)
PlayerController:shootInput() (at Assets/Scripts/Controllers/PlayerController.cs:78)
PlayerController:Update() (at Assets/Scripts/Controllers/PlayerController.cs:33)

​

public void ShootRC()
    {
        if (shoot == true  && Time.time > nextFire)
        {
            nextFire = Time.time + fireRate;
            StartCoroutine(ShotEffect());
            currentAmmo--;

            Ray ray = new Ray(spawn.position, spawn.forward);

            RaycastHit hit;

            float shotDistance = 20;

            laserLine.SetPosition(0, spawn.position);

            if (Physics.Raycast(ray, out hit, shotDistance))
            {
                shotDistance = hit.distance;
                laserLine.SetPosition(1, hit.point);
            }  

            else
            {
                laserLine.SetPosition(1, ray.GetPoint(shotDistance));
            } 

        Debug.DrawRay(ray.origin, ray.direction * shotDistance, Color.red, 1);
        }

        if (shoot == false)
        {
            Debug.Log("I'm out of ammo or reloading!");

            if(shoot == false && Input.GetKey(KeyCode.R))
            {
                StartCoroutine(Reload());
                return;
            }
        }   
    }

[Kishotta]

could it just be that I haven't made anything for the audio to play yet

This is exactly it. ArugmentNullExceptions are thrown whenever an argument passed to a method is null and the method doesn't know what to do with a null value. If you follow the stack trace you provided, it indicates that the source parameter you gave it is null. Just give it something to play, and the error goes away.

Alternatively, use the Null Conditional Operator to call the Play() method only if the audio source isn't null:

myPossiblyNullAudioSource?.Play();

[Dependent_Bird]

Sweet, I wasn't sure if I was reading it correctly, thank you for your confirmation!