hey guys im new to unity and im tryng to do the roll a ball and i have this error can anyone help? :(

NullReferenceException: Object reference not set to an instance of an object
PlayerControler.FixedUpdate () (at Assets/_seanes/Materials/Scripts/PlayerControler.cs:20)

You need to change the spelling of your “start” method. The rigidbody isn’t being found(so the rb variable remains null) because of the case sensitivity of the Unity method. So change:

void start ()

to

void Start ()

with a capital “S”

omg it worked thenks man :smiley: @landern