参数url必须为非null

Parameter url must be non-null

<script type="text/javascript">
    var so = new SWFObject("preview.swf", "", "100%", "100%", "9", "#ffffff");
    so.addParam("allowFullScreen", "true");
    so.addParam("scale", "noscale");
    so.addParam("menu", "false");
    so.addVariable("xmlPath", "xml/exampleData.xml");
    so.write("flashcontent");
</script>

exampleData.xml

 public var xmlPath:String

private function loadComp(data:String):void
        {
            xmlModel.xml = new XML(data);
            new LoadXml(xmlPath, picHandler);
        }

Parameter url must be non-null

private function loadComp(data:String):void
        {
            xmlModel.xml = new XML(data);
            new LoadXml('xml/exampleData', picHandler);
        }