Object reference not set to an instance of an object when the object is already destroyed?

Questions & Answers
1

I have an object which has a script, when there are 2 raycasts hitting 2 other objects it will destroy the other 2 objects and itself.

			if(transform.parent.GetComponent<Molecule>().test){

				hit.transform.parent.GetComponent<Molecule>().test2 = true;
			}

When the objects get destroyed I get an error on the line:

			hit.transform.parent.GetComponent<Molecule>().test2 = true;

Can someone explain the reason behind this? when test2 is true it will destroy the object.
When pressing the error in Unity it also does not direct me to an object causing the error, meaning it got destroyed (right?) the game pauses because of this every single time.

the error:

NullReferenceException: Object reference not set to an instance of an object
Cylinder.Update () (at Assets/Scripts/Cylinder.cs:18)

Thanks!

2

Well that does make perfect sense does it not? You have destroyed the object so next time you try to access it (with GetComponent() ) it will be null. You should check if the object you hit has the component before doing anything with the component.