Constructor arguments problem ActionScript 3 - actionscript-3

Question

I have a custom class defined in Actionscript and I want to make an instance of it in the main document of Flash application. However, after calling the constructor with one argument, Flash gives me this error:
Error #1063: Argument count mismatch on coa.application::MenuItem(). Expected 1, got 0.
This is my class:
public class MenuItem extends MovieClip{
var button:SimpleButton;
public function MenuItem(buttonLoc:uint) {
button = new InvBtn();
this.addChild(button);
button.x=-81;
button.y=buttonLoc*33;
button.addEventListener(MouseEvent.CLICK, mybringToFront);
}
}
And this is my attempt to call its constructor:
var menu1:MovieClip = new MenuItem(3);
Any idea, whats wrong?

Answer 1

Apologies, I can't comment yet, or I'd put this in a comment.
Are you sure that:
var menu1:MovieClip = new MenuItem(3);
is the only place that you're constructing a new MenuItem? You don't by any chance have the MenuItem class attached to some instances on the stage?
I changed your code to this (just so I could run it) and it works fine:
package{
import flash.display.MovieClip;
import flash.display.SimpleButton;
import flash.events.MouseEvent;
public class MenuItem extends MovieClip{
var button:SimpleButton;
public function MenuItem(buttonLoc:uint) {
button = new SimpleButton();
this.addChild(button);
button.x=-81;
button.y=buttonLoc*33;
button.addEventListener(MouseEvent.CLICK, mybringToFront);
}
public function mybringToFront(event:MouseEvent):void{
trace('blah');
}
}
}

Answer 2

Like quoo said, most likely you have an instance of the object that the class is attached to on stage. To test for that do this:
public class MenuItem extends MovieClip{
var button:SimpleButton;
// I changed it to int, cuz uint is extremely slow for any math
// other than bitwise operators, int is fast as long as no fractions
public function MenuItem(buttonLoc:int = -1) {
if (buttonLoc == -1)
trace("On stage instance found! Location: "+x+", "+y);
button = new InvBtn();
this.addChild(button);
button.x=-81;
button.y=buttonLoc*33;
button.addEventListener(MouseEvent.CLICK, mybringToFront);
}
}