is not a part of transform/not set to an instance of an objet error

There's this bit of code I can't help myself with

script name: easearoundease.js :

var sliceCubes:Transform[];

var centralCube:Transform;
var axisOfARotation = Vector3.forward;
var rotationAmount = 90;
var howLongRotation= 1.0;

function Update () {
    if(Input.GetMouseButtonDown(0)){
        for(var cube : Transform in sliceCubes) cube.GetComponent(rotatearoundease).RotateObject(centralCube.position, axisOfARotation, rotationAmount, howLongRotation);
    }
    if(Input.GetMouseButtonDown(1)){}
        //~ for(var cube : Transform in sliceCubes) cube.RotateObject(centralCube.position, -axisOfARotation, rotationAmount, howLongRotation);
}

function RotateObject(point : Vector3, axis : Vector3,
                      rotateAmount : float, rotateTime : float) {
    var step : float = 0.0; //non-smoothed
    var rate : float = 1.0/rotateTime; //amount to increase non-smooth step by
    var smoothStep : float = 0.0; //smooth step this time
    var lastStep : float = 0.0; //smooth step last time
    while(step < 1.0) { // until we're done
        step += Time.deltaTime * rate; //increase the step
        smoothStep = Mathf.SmoothStep(0.0, 1.0, step); //get the smooth step
        transform.RotateAround(point, axis, 
                               rotateAmount * (smoothStep - lastStep));
        lastStep = smoothStep; //store the smooth step
        yield;
    }
    //finish any left-over
    if(step > 1.0) transform.RotateAround(point, axis, rotateAmount * (1.0 - lastStep));
}

It's basically a code for Rubik's Cube attempt. for the project related to this thread: http://answers.unity3d.com/questions/22375/rubiks-cube-problem

but as you may see there's always a problem with 13th line.

if(Input.GetMouseButtonDown(0)){
    for(var cube : Transform in sliceCubes) cube.GetComponent(rotatearoundease).RotateObject(centralCube.position, axisOfARotation, rotationAmount, howLongRotation);
}

I tried putting

if(Input.GetMouseButtonDown(0)){
    for(var cube : Transform in sliceCubes) cube.GetComponent(rotatearoundease).RotateObject(GetComponent(rotatearoundease).centralCube.position, GetComponent(rotatearoundease).axisOfARotation, GetComponent(rotatearoundease).rotationAmount, GetComponent(rotatearoundease).howLongRotation);
}

thinking that "cube" might not know what's in THIS script, but no. doesn't help.

Does anyone see an error here? Thank you for help.

The code looks a bit too complicated as you have it - declare the array as:

var sliceCubes : rotatearoundease[];

and things become much easier - no more GetComponent necessary, so no chance of screwing up there, and you still just drag the object on the same way as before (you don't need to drag via the component itself, for example)

On top of that, it stops you dragging on transforms which don't have your script, which is a very good thing

Note: It's best to remove all entries from the array and re-add them fresh, otherwise things get a bit iffy