TypeError: Error #2007: 参数 type 不能为空。
at flash.events::EventDispatcher/addEventListener()
at mx.core::Container/addEventListener()
at Function/<anonymous>()[D:\flas代码\nms\src\com\ztesoft\nms\web\topology\resource\script\systemTopology.as:166]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()
at twaver.network.interaction::BasicInteractionHandler/dispatchEvent()[/Users/paul/Documents/workspace/Code/Flex/TWaver/src/twaver/network/interaction/BasicInteractionHandler.as:32]
at twaver.network.interaction::DefaultInteractionHandler/handleMouseDown()[/Users/paul/Documents/workspace/Code/Flex/TWaver/src/twaver/network/interaction/DefaultInteractionHandler.as:90]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()
at mx.managers::SystemManager/mouseEventHandler()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\SystemManager.as:2924]

具体报错如上;
我把flex 的sdk4.5.1 version=15 Player11.5；还是有这个问题，请大神讲解下，哪里可能存在问题？

能否提供下示例demo

案列如下：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:twaver="http://www.servasoftware.com/2009/twaver/flex"
minWidth="100" minHeight="100" layout="absolute" initialize="initializeHandler(event)" creationComplete="init();">
<!--<mx:Style source="/resource/style/default.css" />-->
<mx:Script source="com/ztesoft/systemTopology.as" />
<!--<mx:XML source="com/ztesoft/nms/license/license.xml" id="license"/>-->
<mx:VBox width="100%" height="100%" horizontalGap="0" backgroundColor="0xE2E8F2">
<mx:Canvas width="100%" height="100%" verticalScrollPolicy="off" horizontalScrollPolicy="off">
<twaver:Network id="network" width="100%" height="100%"/>
</mx:Canvas>
</mx:VBox>
</mx:Application>

import flash.events.MouseEvent;

import mx.controls.Alert;
import mx.events.FlexEvent;

public function initializeHandler(event:FlexEvent):void{
network.addEventListener(MouseEvent.RIGHT_CLICK, handleRightClick);
}


function handleRightClick():void{
Alert.show("111");

}
文件是项目文件，把后缀改下fxp。

参考链接：
[url]
http://servasoft.com/twaver-flex/%E4%BD ... 8D%95.html
[/url]

ok，谢谢了