Constructor arguments problem ActionScript 3

Hi, 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?

From stackoverflow

• 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');
        }
      }
  }
  

  Dungeo : oops, yes, you are right, there was an instance of that symbol on the stage, but i didnt realize it until reading this ;) thanxalot

• 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);
          }
  }