SmoothDamp not working?

Hi,

I am moving my object using: transform.position.z-=0.1; because it is set to kinematic... I am trying to make the movement of this object much smoother, searching the WWW I find http://docs.unity3d.com/Documentation/ScriptReference/Mathf.SmoothDamp.html

So I changed the code from that page to match my preferred z axis, see code below:

var target : Transform; var smoothTime = 0.3; var zVelocity = 0.0; var newPosition : float = Mathf.SmoothDamp(transform.position.z, target.position.z, zVelocity, smoothTime); transform.position = Vector3(transform.position.x, transform.position.y, newPosition);

I have this in FixedUpdate() .. When running the code I see the exception: NullReferenceException: Object reference not set to an instance of an object script+$windtimer$54+$.MoveNext () (at Assets/Standard Assets/Character Controllers/Sources/Scripts/script.js:121)

It is failing on line: var newPosition : float = Mathf.SmoothDamp(transform.position.z, target.position.z, zVelocity, smoothTime);

Can anyone tell why this is failing? Or has anyone got some code (or could adapt my code) that might make it easier to smoothly move objects to a new location?

Hmmm, even if I use the unedited code from that Unity reference it give the same error?!

many thanks in advance, Kim