Error #1007: Instantiation attempted on a non-constructor. at flexlib.containers::WindowShade/createOrReplaceHeaderButton()[/Users/groumly/Development/workspace-3.5-flex4/FlexLib/src/flexlib/containers/WindowShade.as:258]

[nicoulaj]

Originally filed by [email protected] on 2011-04-25T05:31:41

What steps will reproduce the problem?

1. When swf file is loaded in top of mainApplication Swf (or Wrapper file) file.
2. When moving from Flex 3 to Flex 4

What is the expected output? What do you see instead?
We should be able to see the window shade component ( button) .
We are not able to see the button
Error message is displayed

  TypeError: Error #1007: Instantiation attempted on a non-constructor.
at flexlib.containers::WindowShade/createOrReplaceHeaderButton()
at flexlib.containers::WindowShade/createChildren()
at mx.core::UIComponent/initialize()
at mx.core::Container/initialize()
at mx.core::UIComponent/http://www.adobe.com/2006/flex/mx/internal::childAdded()
at mx.core::Container/http://www.adobe.com/2006/flex/mx/internal::childAdded()
at mx.core::Container/addChildAt()
at mx.core::Container/addChild()

What version of the product are you using? On what operating system?
Flex builder 4.0 and SDK 4.1.0

Please provide any additional information below.

My Wrapper file (Main Application.mxml )

<?xml version="1.0" encoding="utf-8"?> 
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" creationComplete="actionScriptFunction()" >

    <fx:Script> 
        <![CDATA[ 
            import flash.external.*; 
            import mx.controls.Alert;
            import mx.core.FlexGlobals;

            public function init(event : Event):void 
            { 

                myLoader.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); 

            } 

            private function ioErrorHandler(event:IOErrorEvent):void { 
                trace("ioErrorHandler: " + event); 
            } 


            public function actionScriptFunction():void 
            { 

                myLoader.source = FlexGlobals.topLevelApplication.parameters.automationswfurl; <!-- + "?" + urlVars.toString();--> 
            }             


        ]]> 
    </fx:Script> 

    <mx:SWFLoader  id="myLoader"   width="100%" height="100%" loadForCompatibility="true"
                   preinitialize="myLoader.loaderContext = new LoaderContext(false, ApplicationDomain.currentDomain)"> 
    </mx:SWFLoader> 


</s:Application>