Error getting animation info

Hi.

I have a 2D animation made by animation window.

In animator, i create this:



The animation plays good and i have no problem with this.

But in other script in the same scene, i want show the GUI when the animation ends (MoveCastle ends).

The object are this:



and my code is:

Code (csharp):

1. public Animator anim;
2.  
3. void OnGUI()
4.     {
5. if (anim.animation.isPlaying) {
6.             print ("SUCCESS!!!");  
7. }  
8.         }

And this not works, i recieve this error:

How i can access to the animation to control it?

Im not using avatar or 3d bones because i only animate sprites moving it.

Thanks!