Problem to generete HTML from xsl file and Document object

[Mazzarol Guido]

I'm using a servlet to create HTML code with xsl and xml files as follows

      TransformerFactory tFactory = TransformerFactory.newInstance();
      // Get the XML input document and the stylesheet.
      Source xmlSource = new StreamSource(new
URL("file:c:\\java\\test.xml").openStream());
      Source xslSource = new StreamSource(new
URL("file:\\test.xsl").openStream());
      // Generate the transformer.
      Transformer transformer = tFactory.newTransformer(xslSource);
      // Perform the transformation, sending the output to the response.
      transformer.transform(xmlSource, new StreamResult(out));

and it works, but when i try to use xml as a object replacing the last line
with this one

      // Document doc = ... 
      transformer.transform(new DOMSource(doc), new StreamResult(out));

the following runtime error appear:

      java.lang.NoSuchMethodError: org.w3c.dom.Node: method
getNamespaceURI()Ljava/lang/String; not found

Thanks

Guido