Hello, First, sorry for my approximate English , I try to explain my problem as clearly as possible. When i use the pdf generator by clicking on the "pdf button" in the XWiki menu bar, the generated pdf dont have any size. Then, when I want to open it, I obtain an error saying to me that the document is damaged or corrupted. Finally, in my server logs, i have Wrapped Exception: org.apache.fop.fo.ValidationException: null:1:182: Error(1/182): fo:root, Error processing foreign attribute: http://www.w3.org/XML/1998/namespace/@xml:lang com.xpn.xwiki.XWikiException: Error number 12002 in 12: Exception while exporting PDF Wrapped Exception: org.apache.fop.fo.ValidationException: null:1:182: Error(1/182): fo:root, Error processing foreign attribute: http://www.w3.org/XML/1998/namespace/@xml:lang at com.xpn.xwiki.pdf.impl.PdfExportImpl.exportXMLFO(PdfExportImpl.java:162) at com.xpn.xwiki.pdf.impl.PdfExportImpl.exportXHtml(PdfExportImpl.java:107) at com.xpn.xwiki.pdf.impl.PdfExportImpl.exportHtml(PdfExportImpl.java:170) at com.xpn.xwiki.pdf.impl.PdfExportImpl.export(PdfExportImpl.java:184) at com.xpn.xwiki.pdf.impl.PdfExportImpl.exportToPDF(PdfExportImpl.java:174) at com.xpn.xwiki.web.PDFAction.render(PDFAction.java:44) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:150) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:690) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) at java.lang.Thread.run(Thread.java:595) Hope, that anybody can help me! Regards, Christophe