Resolved Run-time error when changing string in TextMeshPro.

Hello.
A runtime error occurred when rewriting the TextMeshPro string.
The string has changed.
Why is this code giving an error?

error message

NullReferenceException: Object reference not set to an instance of an object

BoardTateyaController.Update () (at Assets/Scripts/BoardTateyaController.cs:32)

BoardTateyaController.cs

Code (csharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using TMPro;
5.  
6. public class BoardTateyaController : MonoBehaviour
7. {
8.     public TMP_Text myText;
9.     public int cnt = 0;
10.  
11.     // Start is called before the first frame update
12.     void Start()
13.     {
14.     }
15.  
16.     // Update is called once per frame
17.     void Update()
18.     {
19.         string txt = "Hello";
20.  
21.         if (cnt % 2 == 1)
22.         {
23.  
24.             txt = "Hello";
25.         }
26.         else
27.         {
28.             txt = "World";
29.  
30.         }
31.  
32.         myText.SetText(txt); // error occurred here
33.  
34.         cnt++;
35.     }
36.  
37. }

my execution environment
Unity Editor 2021.3.11f1
TextMeshPro 3.0.6

my settings
[Hierarchy] > [+] > [3D Object] > [Text-TextMeshPro]

 

Debug.Log(myText)

will tell you the reason.

 

Thank you.
I've confirmed.
it is null.
I made a mistake in the inspector settings.

 

For future reference, you NEVER need to post in the forums for a NullReferenceException.

Why? Because it will not solve your problem. These three steps will ALWAYS solve your problem:

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:
- Identify what is null <-- any other action taken before this step is WASTED TIME
- Identify why it is null
- Fix that

 

Thank you.
I learned a lot!