# Solving compiler error: Classes may only be defined in external ActionScript 2.0 clas

**URL:** <https://forum.kirupa.com/t/solving-compiler-error-classes-may-only-be-defined-in-external-actionscript-2-0-clas/295337>\
**Category:** flash\
**Created:** [August 28, 2009, 10:35am UTC](https://forum.kirupa.com/t/solving-compiler-error-classes-may-only-be-defined-in-external-actionscript-2-0-clas/295337 "2009-08-28T10:35:03Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![mihaispr](https://avatars.discourse-cdn.com/v4/letter/m/53a042/32.png) [@mihaispr](https://forum.kirupa.com/u/mihaispr)\
**Post date:** [August 28, 2009, 10:35am UTC](https://forum.kirupa.com/t/solving-compiler-error-classes-may-only-be-defined-in-external-actionscript-2-0-clas/295337/1 "2009-08-28T10:35:03Z")

</div>

Hi everyone and thanks for reading my question. I have a class named Box. I want to display all the properties in Window-\>Output or CTRL+ENTER. I use actionscript 2.

I’m trying this code: (using for -in statement in a class)

```auto

class Box {
public static var maxWidth:Number = 250;
public static var maxHeight:Number = 250;
}

 // avec for on listes toutes les proprietes de la classe Box

// on liste les valeurs des dates membre de la classe Box avec for-in
for (var prop:String in Box) 
{
trace("propriete nom: " + prop);
trace("propriete valeur: " + Box[prop]);
} 

```

I want to return this on pressing CTRL+ENTER: (my desired output)

```auto

propriete nom: maxHeight
propriete valeur: 250
property nom: maxWidth
property valeur: 250  

```

But I have this error on running my code:

```auto

     Classes may only be defined in external ActionScript 2.0 class scripts. 

```

I put for-in in the exterior of class Box but without result.

How can I correct my code to display the thing I want?

**Also I have the same error on this dynamic class Box:**

```auto

     dynamic class Box {
public var width:Number = 15;
public var height:Number = 15;
}

// Creation d'une instance
var b:Box = new Box( );
// ajout de la propriete dynamique de l'instance
b.newProp = "hello world";
// enumeration des proprietes
for (var prop in b) {
trace("propriete nom: " + prop);
trace("propriete valeur: " + b[prop]);
}

```

Desired output:

```auto

//propriete nom: newProp
//propriete valeur: hello world 

```

Error received in output :

```auto

 
     Classes may only be defined in external ActionScript 2.0 class scripts.

```

How can I correct my 2 codes to solve that conflicting error in this 2 cases?