NullReferenceException (local rotation)

Questions & Answers
1

I’m getting this error: NullReferenceException: UnityEngine.Transform.get_localRotation() for this line right here:

motor.axle.Rotate(Vector3.up * motor.RPM * Time.deltaTime);

The variable motor is this class:

public class SimMotor {

	public bool active = true;
	public string ID = "MA-1";
	public float RPM = 1;
	public float torque = 1;
	public Transform motorBody = null;
	public Transform axle = null;
	public TextMesh systemDisplay = null;
	public SimGear engagedGear;

	public Material[] motorMaterials;
}

So motor.axle is just the actual transform of the axle on the motor. I just want it to rotate but I keep getting that error. Any idea why?

Note: The ‘axle’ transform has no children.

Another note: It has nothing to do with the axle transform itself, because I get the error no matter what I set as the axle.

Another Another Note: I’m getting the feeling that Unity is weirding out because this only happened after the last update. Every single error I’m getting, I receive three times every frame and it treats it like they are all separate errors (even though I have Collapse on in the Debug log, there’s three separate errors and they happen every frame). No idea why this is happening.

2

hi .
this error Occur when a variable was NULL ;

public Transform axle = null;