BCE0005: Unknown identifier: 'bulletSpawn'.

i just get this when i am making bullets BCE0005: Unknown identifier: 'bulletSpawn'.

 var cameraObject : GameObject;
 var targetXRotation : float;
 var targetYRotation : float;
 var targetXRotationV : float;
 var targetYRotationV : float;
 
 var rotateSpeed : float = 0.3;
 
 var holdHeight : float = 0.5;
 var holdSide : float = 0.5;
 var racioHipHold : float = 1;
 var hipToAimSpeed : float = 0.1;
 var racioHipHoldV : float;
 
 var aimRacio : float = 0.4;
 
 var zoomAngle : float = 30;
 
 var fireSpeed : float = 15;
 var waitTilNextFire : float = 0;
 var bullet : GameObject;
 var bulletSpawn : GameObject;
 
 function Update ()
 {
     cameraObject.GetComponent(MouseLookScript).currentTarget(CameraAngle = zoomAngle
     
     if (Input.GetButton("Fire2")){
         cameraObject.GetComponent(MouseLookScript).currentAimRacio = aimRacio;
         racioHipHold = Mathf.SmoothDamp(racioHipHold, 0, racioHipHoldV, hipToAimSpeed);}
     if (Input.GetButton("Fire2") == false){
         cameraObject.GetComponent(MouseLookScript).currentAimRacio = aimRacio;
         racioHipHold = Mathf.SmoothDamp(racioHipHold, 1, racioHipHoldV, hipToAimSpeed);}
         
     transform.position = cameraObject.transform.position + (Quaternion.Euler(0,targetYRotation,0) * Vector3(holdSide * racioHipHold, holdHeight * racioHipHold, 0));
     
     targetXRotationV = Mathf.SmoothDamp( targetXRotation, cameraObject.GetComponent(MouseLookScript).xRotation, targetXRotationV, rotateSpeed);
     targetYRotationV = Mathf.SmoothDamp( targetYRotation, cameraObject.GetComponent(MouseLookScript).yRotation, targetYRotationV, rotateSpeed);
     
     transform.rotation = Quaternion.Euler(targetXRotation, targetYRotation, 0);
 }