HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Servlet execution threw an exception org.openbravo.utils.CharsetFilter.doFilter(Unknown Source) root cause java.lang.NoClassDefFoundError net.sf.jasperreports.engine.xml.JRStyleFactory.createObject(JRStyleFactory.java:179) org.apache.commons.digester.FactoryCreateRule.begin(FactoryCreateRule.java:389) org.apache.commons.digester.Digester.startElement(Digester.java:1361) org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source) org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source) org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source) org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source) org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) org.apache.xerces.parsers.XMLParser.parse(Unknown Source) org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) org.apache.commons.digester.Digester.parse(Digester.java:1647) net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:239) net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:226) net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:214) net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:168) net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:152) org.openbravo.base.secureApp.HttpSecureAppServlet.renderJR(Unknown Source) org.openbravo.erpCommon.ad_reports.ReportInvoicesJR.printPageDataHtml(Unknown Source) org.openbravo.erpCommon.ad_reports.ReportInvoicesJR.doPost(Unknown Source) javax.servlet.http.HttpServlet.service(HttpServlet.java:709) org.openbravo.base.HttpBaseServlet.service(Unknown Source) org.openbravo.base.secureApp.HttpSecureAppServlet.service(Unknown Source) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.openbravo.utils.CharsetFilter.doFilter(Unknown Source) note The full stack trace of the root cause is available in the Apache Tomcat/5.5 logs. Apache Tomcat/5.5