Null Reference Exception - Object Not Set

I have followed JesseEtzler's Advanced Inventory Tutorial on YouTube. However I added my own touch to the script (which works fine) Just the way he referenced his objects is differen than how I need to do mine. My question is how can I achieve this? Thanks In advance.

Inventory Script Also is the EquipMenu script.

 import System.Collections.Generic;
 
 var items : Item[];
 
 var MainInventory : List.<Item> = new List.<Item>();
 
 var EquipMenu : Item[];
 
 
 
 
 function Start () {
     MainInventory.Add(items[0]);
     MainInventory.Add(items[1]);
     MainInventory.Add(items[2]);
     MainInventory.Add(items[3]);
     MainInventory.Add(items[4]);
 
 }
 
 function Update() 
 {
     
 }
 
 
 
 function OnGUI ()
  {
  
 
 
     for(var x = 0; x < MainInventory.Count; x++) {
             if(GUI.Button(Rect(Screen.width/2 + 300, Screen.height/2 + 25 + (20 * x), 100, 20), "" + MainInventory[x].Name)) {
                 if(MainInventory[x].itemType == MainInventory[x].itemType.Cuirass ) {
                     if(MainInventory[x].itemFamily == MainInventory[x].itemFamily.Iron) {
                         if(MainInventory[x].itemID == MainInventory[x].itemID.IronCuirass ){
                             EquipMenu[0] = MainInventory[x];
                             MainInventory.RemoveAt(x);
                             EquipMenu[0].IsEquipped = true;
                         }
                     }
                 }    
                 else if(MainInventory[x].itemType == MainInventory[x].itemType.Helm ) {
                     if(MainInventory[x].itemFamily == MainInventory[x].itemFamily.Iron) {
                         if(MainInventory[x].itemID == MainInventory[x].itemID.IronHelm ){
                             EquipMenu[1] = MainInventory[x];
                             MainInventory.RemoveAt(x);
                             EquipMenu[1].IsEquipped = true;
                         }
                     }
                 }
                 else if(MainInventory[x].itemType == MainInventory[x].itemType.Greaves ) {
                     if(MainInventory[x].itemFamily == MainInventory[x].itemFamily.Iron) {
                         if(MainInventory[x].itemID == MainInventory[x].itemID.IronGreaves ){
                             EquipMenu[2] = MainInventory[x];
                             MainInventory.RemoveAt(x);
                             EquipMenu[2].IsEquipped = true;
                         }    
                     }    
                 }
                 else if(MainInventory[x].itemType == MainInventory[x].itemType.Boots ) {
                     if(MainInventory[x].itemFamily == MainInventory[x].itemFamily.Iron) {
                         if(MainInventory[x].itemID == MainInventory[x].itemID.IronBoots ){
                             EquipMenu[3] = MainInventory[x];
                             MainInventory.RemoveAt(x);
                             EquipMenu[3].IsEquipped = true;
                         }
                     }
                 }
                 else if(MainInventory[x].itemType == MainInventory[x].itemType.Gauntlets ) {
                     if(MainInventory[x].itemFamily == MainInventory[x].itemFamily.Iron) {
                         if(MainInventory[x].itemID == MainInventory[x].itemID.IronGauntlets ){
                             EquipMenu[4] = MainInventory[x];
                             MainInventory.RemoveAt(x);
                             EquipMenu[4].IsEquipped = true;
                         }    
                     }
                 }                
             }
         }
     
     for(var y = 0; y < EquipMenu.length; y++) {
         if(EquipMenu[y] != null) {
         
             if(GUI.Button(Rect(Screen.width/2 + 410, Screen.height/2 + 25 + (20 * y), 100, 20), "" + EquipMenu[y].Name)) {
             
                 
                     MainInventory.Add(EquipMenu[y]);
                     EquipMenu[y].IsEquipped = false;
                     EquipMenu[y] = null;
                     
                 
             }
         }
     }
 }

Here is my Renderer Script that tells the Skinned Mesh Renderer when to be true or false This calls for a "true" or "false" statement from the Inventory and equipmenu

 public var enabled : boolean;
 
 renderer.enabled = false;
 
 function Update() {
             
             if(GameObject.Find("Human_M_Full1").GetComponent("Inventory").EquipMenu[0].IsEquipped) {
                 renderer.enabled = true;
             }
             else if(!GameObject.Find("Human_M_Full1").GetComponent("Inventory").EquipMenu.IsEquipped) {
                 renderer.enabled = false;
             }    
         }

• Here's the Exception Error I get* This happens for each piece of armor (mesh) I have *

  NullReferenceException: Object reference not set to an instance of an object Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory) Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.Object[] args, System.String cacheKeyName, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory) Boo.Lang.Runtime.RuntimeServices.GetProperty (System.Object target, System.String name) UnityScript.Lang.UnityRuntimeServices.GetProperty (System.Object target, System.String name)

By the way this only happens when I Unequip the Item and try to reset my EquipMenu[y] back to null.

EquipMenu[y] = null;) that's when the error occurs.

Any help is greatly appreciated! Thanks guys!