Sending variables works but calling function does not

I can’t seem to pass values through to the AnimatedTextureExtendedUV.js, taken from the Wiki, on my iPhone project. This is the AnimatedTextureExtendedUV code as attached to my object. The script is called SpriteAnim.

//vars for the whole sheet
var colCount    : int =  4;
var rowCount    : int =  4;

//vars for animation
var rowNumber   : int =  0; //Zero Indexed
var colNumber   : int =  0; //Zero Indexed
var totalCells  : int =  4;
var fps  : int = 10;
var offset  : Vector2;  //Maybe this should be a private var

//Update
function Update () { SetSpriteAnimation(colCount,rowCount,rowNumber,colNumber,totalCells,fps);  }

//SetSpriteAnimation
function SetSpriteAnimation(colCount : int,rowCount : int,rowNumber : int,colNumber : int,totalCells : int,fps : int){

    // Calculate index
    var index : int = Time.time * fps;
    // Repeat when exhausting all cells
    index = index % totalCells;
    
    // Size of every cell
    var size = Vector2 (1.0 / colCount, 1.0 / rowCount);
    
    // split into horizontal and vertical index
    var uIndex = index % colCount;
    var vIndex = index / colCount;
 
    // build offset
    // v coordinate is the bottom of the image in opengl so we need to invert.
    offset = Vector2 ((uIndex+colNumber) * size.x, (1.0 - size.y) - (vIndex+rowNumber) * size.y);
    
    renderer.material.SetTextureOffset ("_MainTex", offset);
    renderer.material.SetTextureScale  ("_MainTex", size);
}

In my other script, on the same object, I have this:

function Awake () {
   
 var other : SpriteAnim = gameObject.GetComponent(SpriteAnim) as SpriteAnim; 
 
  other.rowNumber=3;  other.fps = 22;	// Works.	
  
   other.SetSpriteAnimation(4,4,0,0,4,5); // Doesn't work.
 }

I seem to be referencing the script ok as the
other.rowNumber=3; other.fps = 22;
line sends these the variables through correctly; the rowNumber var becomes 3 and the fps value becomes 22. But when I try to send them through the function call
other.SetSpriteAnimation(4,4,0,0,4,5); for example, they don’t go through.
I’m probably missing something really simple here on the other.script function code but I can’t find it.

I have functions that work with this Script. I also have multiple texture pages. But I don’t know how to stop this Divide by zero exception.

It seems to work. But it’s impossible to debug. I see two instances of TotalCells for example. so It’ll try and evaluate the template and the function that it’s taking in.