Hi Marius, 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.
Any feedback on this? Did you changed the application context path to "xwiki"? Is the script tag pointing to the right URL? Yes, I have change the context path to xwiki. I think the script tag pointing to the right URL. I copyed the non-database GWT app in the same folder which is \apache-tomcat\webapps\xwiki\resources\js\xwiki\designrationaletypetree and I can loaded it into edit sidebar without any problems. The script tag is $xwiki.jsfx.use("js/xwiki/designrationaletreeview/designrationaletreeview.nocache.js", true), and It is pointed to the right URL. Firebug's console displays all GWT-RPC requests you make so it's easy to detect if (1) the request is send to the right URL and (2) the response is correct. I think it did not get to the point that making the RPC request, from the net tab of Firebug. One thing I think worth noticing is that the request url is that localhost:8000/xwiki/bin/skin/resources/js/xwiki/designrationaletreeview/designrationaletreeview.nocache.js while I think it should not have "skin" in it. I do not know why the url is look like that. I saw the request to get designrationaletreeview.nocache.js (Here is the screenshot: http://picasaweb.google.com/lh/photo/R5iBi4i8hRuuTd-M0Jb55Q?feat=directlink), under the Header tag: Response Headers: ServerApache-Coyote/1.1Last-Modified Fri, 19 Feb 2010 17:05:54 GMT Cache-Controlpublic ExpiresSun, 21 Mar 2010 17:05:54 GMT Content-Type text/javascript;charset=UTF-8Content-Language enContent-Length8639 DateFri, 19 Feb 2010 17:05:54 GMT Request Header: Host localhost:8080User-AgentMozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6 QQDownload/1.7 Accept*/* Accept-Language en-us,en;q=0.5Accept-Encodinggzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive300Connection keep-aliveReferer http://localhost:8080/xwiki/bin/view/Panels/DesignRationaleTreeView CookieJSESSIONID=8D3407935F56F210EB2BFE1CF29BB34B; language=en; username=FS1YvSKKiX8_; password=FS1YvSKKiX8_; rememberme=true; validation=1bc347cc9d3bf770c6c23d35886d4012 Under the response tag: <a href="" onclick="document.getElementById('xwikierror1').style.display='block'; return false;">Error number 4001 in 4: Error while parsing velocity page xwiki:resources.jsWrapped Exception: Failed to evaluate content with id [xwiki:resources.js]</a><div id="xwikierror1" style="display: none;"><pre class="xwikierror">Error number 4001 in 4: Error while parsing velocity page xwiki:resources.jsWrapped Exception: Failed to evaluate content with id [xwiki:resources.js]com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while parsing velocity page xwiki:resources.jsWrapped Exception: Failed to evaluate content with id [xwiki:resources.js] at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:122) Thank you, Marius! Leon