Dear XWiki Devs, Here is the recap of the last conversation: ----------------------------------------------------------------------------Recap Below----------------------------------------------------------------------------------------- http://picasaweb.google.com/lh/photo/0ZTNIoSvoAWZe9NveH_3SA?feat=directlink So the panel is rendered fine, but your JavaScript file (designrationaletreeview.nocache.js) is not loaded correctly. I noticed that the application context path you're using is "xwiki-enterprise-web-2.1.1" instead of "xwiki" (e.g. http://localhost:8080/xwiki-enterprise-web-2.1.1/bin/view/Panels/DesignRati… ). AFAIK you have to do some configurations if you want a different context path. My advice is to use the default one, "xwiki". Also, can you check if the URL from the script tag points indeed to your JavaScript file? I can see only the final part of the URL (the file name) in the picture. Paste here the URL. ------------------------------------------------------------------------------Recap Above--------------------------------------------------------------------------------------------------- I can load other GWT(JavaScript) app in XWiki and Edit Sidebar (or say velocity can render them right). I think the difference of loading other non-database GWT application and DesignRationale Tree View is DR Treeview require make a rpc call to server and somehow the velocity could not render it right. Do I need to use XWiki's api to make the rpc call? Or use the Hiberbinate? Can you give me some suggestion how can I fit the Treeview into the XWiki? I deployed the the DR tree view outside of XWiki as a single application it work fine in web.xml, like this: <servlet-mapping> <servlet-name>treeParentServiceImpl</servlet-name> <url-pattern>/designrationaletreeview/treeParent</url-pattern> </servlet-mapping> But when I deploy it within XWiki context, and writing servlet-mapping in web.xml, velocity could not render it right. Should I change the strut stuff? Thank you all! Leon