Null Reference Annoying Error

So I have this script running and it has no errors but when the game is run it simply kicks back

NullReferenceException

AdvancedMovement.SetUp () (at Assets/Scripts/AdvancedMovement.cs:90) AdvancedMovement+c__Iterator0.MoveNext () (at Assets/Scripts/AdvancedMovement.cs:69)

Its supposed to allow me to control my character while keeping the code simple enough to re-used without rewriting it every time I want to make something move

 using UnityEngine;
 using System.Collections;
 
 [RequireComponent(typeof(CharacterController))]
 public class AdvancedMovement : MonoBehaviour {
     public enum State{
         Idle,
         Init,
         Setup,
         Run
     }
 
     public enum Turn{
         left = -1,
         none = 0,
         right = 1
     }
     public enum Forward{
         back = -1,
         none = 0,
         forward = 1
     }
 
     public float RotationalSpeed = 250;            // The speed the player turns
     public float strafeSpeed = 5f;                // The speed the player strafes
     public float walkSpeed = 10;                // The speed the player walks
     public float runSpeed = 2;                    // The speed the player will run at
     public float gravity = 10;                    // A variable for the downward forces of the game
     public float airTime = 0;                    // The set amount of time since the player last touched the ground
     public float fallTime = .5f;                // Amount fo time before a drop is considered a fall
     public float jumpHeight = 2;                // The set height a player can jump
     public float jumpTime = 1.5f;                // The length of time it takes to eecute a jump
 
     public CollisionFlags _collisionFlags;        // Collisions detectec by this variable
     private Vector3 _moveDirection;                // Vector 3 to control the direction a player is moving
     private Transform _myTransform;                // Cached transform for perfomance purposes
     private CharacterController _controller;    // Cached version of the Character Controller
 
     private Turn _turn;
     private Forward _forward;
     private Turn _strafe;
     private bool _run;
     private bool _jump;
 
     private State _state;
 
     public void Awake(){
         _myTransform = transform;
         _controller = GetComponent<CharacterController>();
 
         _state = AdvancedMovement.State.Init;
     }
 
     // Use this for initialization
     IEnumerator Start () {
         while(true){
             switch(_state){
             case State.Init:
                 Init();
                 break;
             case State.Setup:
                 SetUp();
                 break;
             case State.Run:
                 ActionCommands();
                 break;
             }
 
             yield return null;
         }
     }
 
     private void Init(){
         if(!GetComponent<CharacterController>()) return;
         if(!GetComponent<Animation>()) return;
 
         _state = AdvancedMovement.State.Setup;
     }
     private void SetUp(){
         _moveDirection = Vector3.zero;
         animation.Stop();                                // Halt any animatiosn set to play automatically
         animation.wrapMode = WrapMode.Loop;                // Loop animations continuosly
         animation["jump"].layer = -1;
         animation["jump"].wrapMode = WrapMode.Once;
         animation.Play ("idle");                        // Set animation to idle on script and game start
 
         _turn = AdvancedMovement.Turn.none;
         _forward = AdvancedMovement.Forward.none;
         _strafe = AdvancedMovement.Turn.none;
         _run = false;
         _jump = false;
 
         _state = AdvancedMovement.State.Run;
     }
 
     private void ActionCommands(){
         // Allows for left/right movement
             _myTransform.Rotate(0, (int)_turn * Time.deltaTime * RotationalSpeed, 0);
 
         // Checks to see if the player grounded
         if(_controller.isGrounded){
             airTime = 0;
             
             _moveDirection = new Vector3((int)_strafe, 0, (int)_forward);
             _moveDirection = _myTransform.TransformDirection(_moveDirection).normalized;
             _moveDirection *= walkSpeed;
 
             // Allows movement forward and backward
             if(_forward != Forward.none){
                 if(_run){                                // Checks for run command 
                     _moveDirection *= runSpeed;            // Sets the run speed
                     Run ();                                // Plays the run animation
                 }
                 else{
                     Walk ();                            // Plasy the walk animation
                 }
             }
             else if(_strafe != AdvancedMovement.Turn.none){            // Checks for the strafe command
                 Strafe ();
             }
             else{
                 Idle();                                    // If nothing is active return to idle mode
             }
             
             // Controls the Jump animation
             if(_jump){
                 if(airTime < jumpTime){
                     _moveDirection.y += jumpHeight;
                     Jump();
                 }
             }
         }
         else{
             //If we have detected collisons
             if((_collisionFlags & CollisionFlags.CollidedBelow) == 0){
                 airTime += Time.deltaTime;        // Increase the airtime
                 if(airTime > fallTime){            // If character been airborne too long
                 Fall();                            // play the fall animation
                 }
             }
         }
         
         _moveDirection.y -= gravity * Time.deltaTime;
         //Find and store collisions
         _collisionFlags = _controller.Move (_moveDirection * Time.deltaTime);
     }
 
     public void MoveMeForward(Forward z){
         _forward = z;
     }
     public void Turning(Turn y){
         _turn = y;
     }
     public void Strafe(Turn x){
         _strafe = x;
     }
     public void ToggleRun(){
         _run = !_run;
     }
     public void JumpUp(){
         _jump = true;
     }
 
 // Selected animations that will be executed when called by the secondary scripts
     public void Idle(){
         animation.CrossFade("idle");
     }
 
     public void Walk(){
         animation.CrossFade("walk");
     }
 
     public void Run(){
         animation["walk"].speed = 1.5f;
         animation.CrossFade("walk");
     }
 
     public void Strafe(){
         animation.CrossFade("walk");
     }
 
     public void Jump(){
         animation.CrossFade("jump");
     }
 
     public void Fall(){
         animation.CrossFade("fall");
     }
 }

I've been through the code half a dozen times but still cant see why it kicks back the null reference any help guys? I have the character controller and my PlayerInput scripts attached to my character so I'm not missing anything its in this script somewhere I hope