CodeBehind AS Files in Library Project Error 1114

Question

Hello all,
ich already did a search, found people with similar problems but no concrete solution.
The Problem: In FlashBuilder 4 when creating a new LibraryProject I can't put actionscript code (pure code, no class definition, no package)  in seperate actionscript files which are included in the script block of a component. It worked fine in FlexBuilder 3...
I always end up with errors like
1114: The public attribute can only be used inside a package.
Example Code:
Componet MXML definition:
<?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" width="400" height="300" initialize="onInit(event)">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script source="codeBehind/DemoComponent_cb.as"/>
</s:Group>
Actionscript Code for this Component in File codeBehind/DemoComponent_cb.as
public function onInit(e:Event):void
     trace("initialized");
(no class, no package - just these 4 lines)
Just trying to add an empty actionscript file to the projects also results in an Error:
A file found in a source-path must have an externally visible definition. If a definition in the file is meant to be externally visible, please put the definition in a package.
As said before - this worked fine in FlexBuilder 3. Is there a new rule in FB4 not to keep code seperate from mxml in simple actionscript files?
Beeing able to nest Actionscript files with the new include command makes this error even more suspicious.
Is this a bug, a feature, am I doing something wrong? Any help appreciated!
Regards
Andi

Answer 1

Flash Builder 4 has a new option in project properties for Flex Library Build Path. The default "Include all..." option includes all MXML and AS files in the source path. For your case, you'll need to use the old option that forces you to choose which files to include. For more details, find include-sources here http://help.adobe.com/en_US/Flex/4.0/UsingSDK/WS2db454920e96a9e51e63e3d11c0bf69084-7a80.ht ml.
Jason San Jose
Software Engineer, Flash Builder