Flex 4.1 stackview

Question

Hi All,
I am testing migration from flex sdk 3.5 to 4.1.
In flex 3.5 I use viewstack to separate all forms and call each at the time from a menu.
<mx:ViewStack id="VS" x="0" y="0" width="100%" height="100%" creationPolicy="all">
     <custom:test id="test" width="100%" height="100%" />
     <custom:testNew id="test" width="100%" height="100%" />
Each form use canvas in declaration:
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="100%" height="100%" >
<mx:Script>
        <![CDATA[
I see the viewstack still available. I try using s:group in each form:
<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"
         xmlns:s="library://ns.adobe.com/flex/spark"
         xmlns:mx="library://ns.adobe.com/flex/mx"
         xmlns:custom="*"
         width="400" height="300">
    <s:layout>
        <s:BasicLayout/>
    </s:layout>
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
</s:Group>
I am getting an error "1046: Type was not found or was not a compile-time constant: test."
How it works in sdk 4.1?
Thanks

Answer 1

While I don't know where your error comes from, you may be hitting the problem that you can't just use Spark containers inside the mx:ViewStack.
See http://help.adobe.com/en_US/flex/using/WS263BA71B-EA66-4f1f-B311-0C62242A50FF.html