SAXParser stumbles over internal DTD declaration

[Wim de Vries <w.vries@elsevier.nl>]

Hi,
I'm using the SAXparser and it validates OK against an external dtd, but 
when the XML doc also has some internal dtd declarations I get the folowing 
error:
-------------
Exception in thread "main" java.lang.NullPointerException
at org.apache.xerces.frameworkXMLParser.parse.(XMLParser.java:965)
at MySAXApp.main(MySAXApp.java, Compiled code)
-------------
Does someone knows what's going wrong? See code below.
SAXParser fails on:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE personnel SYSTEM "personal.dtd" [<!ENTITY gr1 SYSTEM "gr1" NDATA 
image>]>
<personnel>.........

SAXparser succeeds on:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE personnel SYSTEM "personal.dtd">
<personnel>.........

Thanks.

************************************
     import java.io.FileReader;
      import org.xml.sax.XMLReader;
      import org.xml.sax.InputSource;
	import org.xml.sax.SAXException;
      import org.xml.sax.helpers.XMLReaderFactory;
      import org.xml.sax.helpers.DefaultHandler;
      import org.xml.sax.SAXParseException;


      public class MySAXApp extends DefaultHandler
      {

          public static void main (String args[])
              throws Exception
              { //XMLReader interface gets filled with the SAXParser
              XMLReader xr = new org.apache.xerces.parsers.SAXParser(); 
//XMLReader used to be Parser
                 try {
                  xr.setFeature("http://xml.org/sax/features/validation", 
true);
                } catch (SAXException e) {
                  System.out.println("error in setting up parser 
(XMLReader) feature");
                }
                try {
				xr.setFeature("http://apache.org/xml/features/validation/dynamic", true);
                } catch (SAXException e) {
                  System.out.println("error in setting up parser 
(XMLReader) feature");
                }



              MySAXApp handler = new MySAXApp();
              xr.setContentHandler(handler); //handler (this) shall receive 
notifications of events
              xr.setErrorHandler(handler);
              xr.setDTDHandler(handler);
                                      // Parse each file provided on the
                                      // command line.
              for (int i = 0; i < args.length; i++) {
                  FileReader r = new FileReader(args[i]);
                  xr.parse(new InputSource(r));
              }
          }


          public MySAXApp ()
          {
              super();
          }

	     public void startDocument ()
          {
              System.out.println("Start document");
          }

          public void endDocument ()
          {
              System.out.println("End document");
          }
public void error(SAXParseException exception)
          {
			int LineNumber = exception.getLineNumber();
			String ErrorString = exception.getMessage();
             System.out.print("Stop feeding me invalid docs, you stupid 
idiot: ");
			System.out.print(ErrorString);
			System.out.println(LineNumber);
          }

public void fatalError(SAXParseException exception)
          {
              System.out.println("Fatal error");
          }
public void warning(SAXParseException exception)
          {
              System.out.println("Warning");
          }

public void endDTD()
          {
              System.out.println("enddtd");
          }
public void startDTD(org.apache.xerces.utils.QName rootElement,
                      int publicId,
                      int systemId)
{System.out.println(">>>>>>>>>>");
System.out.println("rootElement");
}	
      }
****************************


With kind regards,

W(im) S. de Vries LL M
Information Structure Technologist
Electronic Production Department
Elsevier Science NL
tel. (+31) 20 4852733
fax  (+31) 20 4852812

Sara Burgerhartstraat 25
1055 KV Amsterdam
The Netherlands