Call a function from other script error

Scripting
1

When i play the game i got this error, how i can solve that?

2996383--223263--3297e65513ebce75f12bab3aa21b23d1.png
2996383--223263--3297e65513ebce75f12bab3aa21b23d1.png993×50 4.52 KB

Code:

    SwichWeapons changeWeapon;


    void Start()
    {
        changeWeapon = GameObject.FindWithTag(playerTag).GetComponent<SwichWeapons>() as SwichWeapons;
    }

    void Update()
    {
        changeWeapon.GetComponent<SwichWeapons>().DefaultWeaponVoid();
    }

Full Code:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using CodeStage.AntiCheat.ObscuredTypes;

public class WeaponShop : MonoBehaviour
{
    [Header("-Tags-")]
    public ObscuredString playerTag = "Player";

    [Header("-Weapon Settings 01-")]
    public Button WeaponButton1;
    public ObscuredInt WeaponPrice1 = 5000;
    public ObscuredInt LevelForWeapon1 = 5;
    public Text weaponPriceText1;
    public GameObject blockedPannel;
    public Text levelTextPermison;

    [Header("-Weapons Boolen Options-")]
    [SerializeField]
    private ObscuredBool weaponPsitol = true;
    [SerializeField]
    private ObscuredBool weaponAssaultRifle = false;

    SwichWeapons changeWeapon;


    void Start()
    {
        changeWeapon = GameObject.FindWithTag(playerTag).GetComponent<SwichWeapons>() as SwichWeapons;

        WeaponButton1.interactable = false;

        weaponPsitol = true;
        weaponAssaultRifle = false;

        weaponPriceText1.text = WeaponPrice1.ToString();
    }

    void Update()
    {
        if(UpgradeMenu.Money >= WeaponPrice1)
        {
            WeaponButton1.interactable = true;
        }
        else
        {
            WeaponButton1.interactable = false;
        }

        if(LevelSystem.PlayerLevel < LevelForWeapon1)
        {
            blockedPannel.SetActive(true);

            levelTextPermison.text = "You don't have level " + LevelForWeapon1;
        }
        else if(LevelSystem.PlayerLevel >= LevelForWeapon1)
        {
            blockedPannel.SetActive(false);
        }



        if(weaponPsitol == true && weaponAssaultRifle == false)
        {

            changeWeapon.GetComponent<SwichWeapons>().DefaultWeaponVoid();

            weaponPriceText1.text = WeaponPrice1.ToString();
        }

        if (weaponAssaultRifle == true && weaponPsitol == false)
        {

            changeWeapon.GetComponent<SwichWeapons>().weapon01Void();

            weaponPriceText1.text = "Owned";
        }
    }

    public void BuyWeapon01()
    {
        if (LevelSystem.PlayerLevel >= LevelForWeapon1)
        {
            if (UpgradeMenu.Money >= WeaponPrice1)
            {
                weaponAssaultRifle = true;
                weaponPsitol = false;

                UpgradeMenu.Money -= WeaponPrice1;
            }
        }
    }
}
2

Which line is line 67? (It should come up which you doubleclick the error)

3

Your error message states that the error is on line #67, however your code above only has 14 lines in it. Is that code above from WeaponShop.cs?

4

the t from Update:
changeWeapon.GetComponent().DefaultWeaponVoid();

5

I edit the post with the full code.

6

changeWeapon is definitely null, which means that your FindWithTag() call is probably not finding it.

Additionally, you don’t need to use GetComponent on it, because it’s already a SwichWeapons object.

7

I added a [SerializeField] for changeWeapon, and is still null, And i don’t have any idea why :))

8

I Solved:

        SwichWeapons changeWeapon = FindObjectOfType(typeof(SwichWeapons)) as SwichWeapons;
        changeWeapon.DefaultWeaponVoid();