Null Reference Exception: Object reference not set to an instance of an object

Hello. Let me be precise, im new to scripting and game programming and i have this book titled "Game Programming Using Unity 3D" im following to build a simple zombie game. But as i reached to where i am to add the walk animation to my 3D model and control it using script, i followed the exact steps given in the book but when i try playing it, it showed me the below code in the console:
Null Reference Exception: Object reference not set to an instance of an object, in this line:

How can i solve this?


usingUnityEngine;
usingSystem.Collections;

publicclassEnemyAnimation : MonoBehaviour
{
Animation Animate;

voidStart ()
{
Animate = GetComponentInChildren<Animation> ();

Animate ["Move1"].wrapMode = WrapMode.Loop; // line where the exception shows
Animate.Play ("Move1");

//Move1 is the name of the animation to play for the walk
}

 

Verify that you gameObject or the child that should has the Animation component in whatever child it should have.