Xalan: Exception on JSP page

[John Gouveia]

Hi   Can anybody please help me with this problem. I am using Xalan-J 2.0.1. and using JSP's. If I execute the transformation in my bean via a main method it transforms successfully.   But if I access the same bean via a JSP page the transformation (with the same xsl and xml files) causes an exception at the 2nd last line of the code:      DOMSource xmlIn= new DOMSource(xmlDocument);    StreamResult output = new StreamResult(new StringWriter());      TransformerFactory tFactory = TransformerFactory.newInstance();    Transformer transformer = tFactory.newTransformer(new StreamSource("string url"));     transformer.transform(xmlIn, output);        result = (output.getWriter()).toString();   the error message: JspServlet: unable to dispatch to requested page: Exception:java.lang.NoSuchMethodError: boolean org.w3c.dom.Node.isSupported(java.lang.String, java.lang.String) The only libraries I am using are servlet.jar(java.servlet package) and  Xerces and Xalan jar files. I have also checked my classpath for old XML files and there are none.   Has anybody got this error before.   thanks