Resolved NullReferenceException but the object is assigned

My solution at the end.

It was a redo of the scene from scratch. I copied and pasted the Menu scene and inserted the player and all the objects. I have done exactly the same and in the new scene it works.

I don't understand the error, because when debugging both the button and the image were correct.

When redoing the scene I didn't change the code either.

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Hello everyone!

I have created a Main Menu scene and in it I have created an Options button that opens the Options panel.

I have created a gameobject to which I have added the Script Options. To this GameObject I have attached the necessary buttons and panels.

And it works perfectly. Then I convert the Options panel and the GameObject with the Script in Prefab.

In the game scene I create a Pause menu and include the options.

I open the Pause menu and click Options. When I click on the Video button, it should change the colours of the buttons and open and close panels, but I get a NullReference error.

When I do Debug.Log in Start(), I see that it is correctly added. I do Debug.Log in Update and it works. When I click on the Video button is when I get the error.

What is the reason for this error? In the menu it works perfectly but in the game I get this error.

If for example I comment out the code to change the colour of the buttons, the error I get is

UnassignedReferenceException: The variable OptionsPanel of Options has not been assigned.

Code (CSharp):

1.  
2. public void activeVideoPanel()
3.     {
4.         buttonSound.GetComponent<Image>().color = Color.white;
5.         buttonVideo.GetComponent<Image>().color = new Color(0.47f, 0.97f, 0.4f, 0.65f);
6.         buttonControl.GetComponent<Image>().color = Color.white;
7.  
8.         OptionsPanel.SetActive(true);
9.         SoundPanel.SetActive(false);
10.         VideoPanel.SetActive(true);
11.         ControlPanel.SetActive(false);
12.     }
13.  

 

The answer NEVER changes... it is ALWAYS the same.

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

Don't write code like this:

If you have more than one or two dots (.) in a single statement, you're just being mean to yourself.

How to break down hairy lines of code:

http://plbm.com/?p=248

Break it up, practice social distancing in your code, one thing per line please.

"Programming is hard enough without making it harder for ourselves." - angrypenguin on Unity3D forums

"Combining a bunch of stuff into one line always feels satisfying, but it's always a PITA to debug." - StarManta on the Unity3D forums

 

I edit the first message to add more information about the error.
The code worked in a Menu, but not in a game scene.

 

IT DOES NOT MATTER. The answer DOES NOT CHANGE.

I'll post it again for you:

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

 

Well the code you posted does not have a Debug.Log or a line 327, so are you sure it has anything to do with the error?