{ ERROR } call a function from other script

hi i need to call a function from a script named with CubeComplete from a script named with wall so this is the wall script

 var endPoint : Vector3;
 var duration : float = 1.0;
 var CubeComplete : Component;
 
 private var startPoint : Vector3;
 private var startTime : float;
  
 function Start() {
     startPoint = transform.position;
     startTime = Time.time;
     CubeComplete = (CubeComplete).GetComponent(typeof(CubeComplete));
 }
  
 function OnMouseOver()
 {
  if(Input.GetMouseButtonDown(0))
  {
   CubeComplete.on();
   transform.position = Vector3.Lerp(startPoint, endPoint, (Time.time - startTime) / duration);
  }
 }

and this is the CubeComplete script

 public var touchCount : int;
 var on : boolean;
 var off : boolean;
 
 function OnCollisionStay (collision : Collision) {
     touchCount = touchCount + 1;
 
         if (touchCount == 4)
             renderer.enabled = false;
         
         }
 function OnCollisionExit (collision : Collision) {
     touchCount = touchCount - 1;
     
         if (touchCount == 0)
             renderer.enabled = true;
         }
 
 function onoff () {
    
     if (on == true)    
         collider.enabled = true;
         yield new WaitForSeconds(2.3f);
         collider.enabled = false;
         
     if (off == false)    
         collider.enabled = false;
 }

and i want to call this

 if (on == true)
     collider.enabled = true;
     yield new WaitForSeconds(2.3f);
     collider.enabled = false;