Call a function from other script error

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


Code:

Code (CSharp):

1.     SwichWeapons changeWeapon;
2.  
3.  
4.     void Start()
5.     {
6.         changeWeapon = GameObject.FindWithTag(playerTag).GetComponent<SwichWeapons>() as SwichWeapons;
7.     }
8.  
9.     void Update()
10.     {
11.         changeWeapon.GetComponent<SwichWeapons>().DefaultWeaponVoid();
12.     }
13.  
14.  

Full Code:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.UI;
4. using CodeStage.AntiCheat.ObscuredTypes;
5.  
6. public class WeaponShop : MonoBehaviour
7. {
8.     [Header("-Tags-")]
9.     public ObscuredString playerTag = "Player";
10.  
11.     [Header("-Weapon Settings 01-")]
12.     public Button WeaponButton1;
13.     public ObscuredInt WeaponPrice1 = 5000;
14.     public ObscuredInt LevelForWeapon1 = 5;
15.     public Text weaponPriceText1;
16.     public GameObject blockedPannel;
17.     public Text levelTextPermison;
18.  
19.     [Header("-Weapons Boolen Options-")]
20.     [SerializeField]
21.     private ObscuredBool weaponPsitol = true;
22.     [SerializeField]
23.     private ObscuredBool weaponAssaultRifle = false;
24.  
25.     SwichWeapons changeWeapon;
26.  
27.  
28.     void Start()
29.     {
30.         changeWeapon = GameObject.FindWithTag(playerTag).GetComponent<SwichWeapons>() as SwichWeapons;
31.  
32.         WeaponButton1.interactable = false;
33.  
34.         weaponPsitol = true;
35.         weaponAssaultRifle = false;
36.  
37.         weaponPriceText1.text = WeaponPrice1.ToString();
38.     }
39.  
40.     void Update()
41.     {
42.         if(UpgradeMenu.Money >= WeaponPrice1)
43.         {
44.             WeaponButton1.interactable = true;
45.         }
46.         else
47.         {
48.             WeaponButton1.interactable = false;
49.         }
50.  
51.         if(LevelSystem.PlayerLevel < LevelForWeapon1)
52.         {
53.             blockedPannel.SetActive(true);
54.  
55.             levelTextPermison.text = "You don't have level " + LevelForWeapon1;
56.         }
57.         else if(LevelSystem.PlayerLevel >= LevelForWeapon1)
58.         {
59.             blockedPannel.SetActive(false);
60.         }
61.  
62.  
63.  
64.         if(weaponPsitol == true && weaponAssaultRifle == false)
65.         {
66.  
67.             changeWeapon.GetComponent<SwichWeapons>().DefaultWeaponVoid();
68.  
69.             weaponPriceText1.text = WeaponPrice1.ToString();
70.         }
71.  
72.         if (weaponAssaultRifle == true && weaponPsitol == false)
73.         {
74.  
75.             changeWeapon.GetComponent<SwichWeapons>().weapon01Void();
76.  
77.             weaponPriceText1.text = "Owned";
78.         }
79.     }
80.  
81.     public void BuyWeapon01()
82.     {
83.         if (LevelSystem.PlayerLevel >= LevelForWeapon1)
84.         {
85.             if (UpgradeMenu.Money >= WeaponPrice1)
86.             {
87.                 weaponAssaultRifle = true;
88.                 weaponPsitol = false;
89.  
90.                 UpgradeMenu.Money -= WeaponPrice1;
91.             }
92.         }
93.     }
94. }
95.  

 

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

 

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?

 

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

 

I edit the post with the full code.

 

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

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

 

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

 

I Solved:

Code (CSharp):

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