NullReferenceException... but it was just set...?

Questions & Answers
1

I have a Main scene. In this scene, I have an object called “GameController” which is where I’m keeping things like the overall score and other objects that the game needs. One is a list:

public List<myClass> myclassList = new List<myClass>();

In a second scene, I add items to the list. When I get back to the Main scene, it does give me the correct/expected Count of items in the list. But something is screwy when I’m trying to access the members of the list.

To troubleshoot, in the GameController Update method, I added the following:

	if (myclassList.Count > 0) {
		Debug.Log (myclassList [0].astringfrommyclass);
	}

And here’s the weirdness… in my console, on the first Update, I get one correct output message with the expected string that’s in astringfrommyclass. But that’s it. then I keep getting the NullReferenceException on that line of code.

Help??

This is in Unity 2017.3.0f3 and while I’m a relatively experienced programmer, I’m new to Unity.

2

Scenes are not persistent to each other. If you want to save your values from one scene to the other, you will have to either store your data using PlayerPrefs or UnityEngine.IO, or use Singleton approach on your script and then DontDestroyOnLoad();