IndexOutOfRangeException: Index was outside the bounds of the array.

Unity Engine
1

Hello friends, i have this error in unity 2019.2.15:

IndexOutOfRangeException: Index was outside the bounds of the array.
LoadingScene.RandImg () (at Assets/Scripts/LoadingScene.cs:63)
LoadingScene.Start () (at Assets/Scripts/LoadingScene.cs:31)

using System.Collections;
using UnityEngine;
using UnityEngine.UI;

public class LoadingScene : MonoBehaviour
{
    public Text LOADINGTEXT;

    public Text LOADINGTEXT_X;
    public bool isForEver;

    public GameObject explain_ImgObj;
    public GameObject explain_ImgObj2;

    public Sprite[] LLoadingImg;
    public Sprite[] LLoadingImg2;
    private int iLastR;
    private int iLastR2;

    public void candy2()
    {
    }

  
    private void Start()
    {

      
        Singleton<DataManager>.Instance.SetLanguageFont(LOADINGTEXT, Singleton<DataManager>.Instance.LanguageColor[0], Singleton<DataManager>.Instance.LanguageColor[0], 0f, "LOADINGTEXT");
        StartCoroutine(StartLoading());
        RandImg();
        hideBanner();
        HideCenterBanner();
    }

    public void hideBanner()
    {

    }

    public void HideCenterBanner()
    {

    }

    public void RandImg()
    {
        Singleton<DataManager>.Instance.SetLanguageFont(LOADINGTEXT, Singleton<DataManager>.Instance.LanguageColor[0], Singleton<DataManager>.Instance.LanguageColor[0], 0f, "LOADINGTEXT");
        int num = Random.Range(0, 5);
        while (iLastR == num)
        {
            num = Random.Range(0, 5);
        }
        iLastR = num;
        int num2 = Random.Range(0, 5);
        while (iLastR2 == num2)
        {
            num2 = Random.Range(0, 5);
        }
        iLastR2 = num2;
        DataManager.LoadingSceneImageIndex = num;
        DataManager.LoadingSceneImageIndex = num2;
        explain_ImgObj.gameObject.GetComponent<Image>().sprite = LLoadingImg[num];
        explain_ImgObj2.gameObject.GetComponent<Image>().sprite = LLoadingImg2[num2];
        Singleton<DataManager>.Instance.SetLanguageFont(LOADINGTEXT_X, Singleton<DataManager>.Instance.LanguageColor[0], Singleton<DataManager>.Instance.LanguageColor[1], 0.16f, "LOADINGTEXT" + (num + 1));
    }




private IEnumerator StartLoading()
    {
        if ((bool)MapController.controller)
        {
            MapController.controller.gameObject.SetActive(value: false);
        }
        yield return new WaitForSeconds(0.1f);
        UnityEngine.Debug.Log("Lihai==== 111111111111");
        EnumSceneType ChangeSceneType = Singleton<DataManager>.Instance.ChangeSceneType;
        string sceneName = Singleton<SceneManager>.Instance.GetSceneName(ChangeSceneType);
        UnityEngine.Debug.Log("Lihai==== 2222222222");
        UI.Instance.ClearUI();
        UnityEngine.SceneManagement.SceneManager.LoadScene(sceneName);
        UnityEngine.Debug.Log("Lihai==== 3333333");
        if ((bool)LoadingSceneUI.action && Singleton<DataManager>.Instance.ChangeSceneType != EnumSceneType.LevelScene)
        {
            LoadingSceneUI.action.HideLoadingSceneUI();
        }
    }
}

I don’t know what is wrong. Can anyone help me please?
Thanks.

2

The error is fairly clear. IndexOutOfRange means you’re trying to access an index that doesn’t exist, thus out of range.

So if your LLoadingImg array only has 2 items in it but you try to access index slot 4, it can’t find anything.

Unless you know you have 5 items in it, it’s better to do this

Random.Range(0, LLoadingImg.Length);