# Concating a variable + Coercion error

**URL:** <https://forum.kirupa.com/t/concating-a-variable-coercion-error/318815>\
**Category:** flash\
**Created:** [January 31, 2011, 2:37pm UTC](https://forum.kirupa.com/t/concating-a-variable-coercion-error/318815 "2011-01-31T14:37:05Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![jimjiminyjimjim](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@jimjiminyjimjim](https://forum.kirupa.com/u/jimjiminyjimjim)\
**Post date:** [January 31, 2011, 2:37pm UTC](https://forum.kirupa.com/t/concating-a-variable-coercion-error/318815/1 "2011-01-31T14:37:05Z")

</div>

I’m trying to form an instance name dynamically.

```auto

        var a:Array=[];	
	a=targetName.split("_");			
	turntoID = a[0]+1;
	var popup = stage.addChild(["popUpMessage"+turntoID]);

```

But I get this error:

1067: Implicit coercion of a value of type Array to an unrelated type flash.display:DisplayObject.

Any ideas?