Puzzling Java error

["Patrick Townsend" <patownsend@xxxxxxxxxxxxxx>]

I am getting the following Java exception. This application is running fine
on a variety of platforms (V4R5, V5R1, V5R2). The customer has 5769JC1
installed. The Classpath look OK. Any thoughts? Any pointers on how to
interpret this set of messages would be appreciated, too.

java.lang.NoSuchMethodError
      java/lang/Error.<init>()V+1 (Error.java:43)

xmlis/TraceSaxEvents.endElement(Ljava/lang/String;Ljava/lang/String;Ljava/la
ng/String;)V+0 (TraceSaxEvents.java:54)

org/apache/xerces/parsers/SAXParser.endElement(Lorg/apache/xerces/utils/QNam
e;)V+0 (SAXParser.java:1391)
      org/apache/xerces/validators/common/XMLValidator.callEndElement(I)V+0
(XMLValidator.java:1379)

org/apache/xerces/framework/XMLDocumentScanner$ContentDispatcher.dispatch(Z)
Z+0 (XMLDocumentScanner.java:921)
      org/apache/xerces/framework/XMLDocumentScanner.parseSome(Z)Z+0
(XMLDocumentScanner.java:381)

org/apache/xerces/framework/XMLParser.parse(Lorg/xml/sax/InputSource;)V+0
(XMLParser.java:1075)
      org/apache/xerces/framework/XMLParser.parse(Ljava/lang/String;)V+0
(XMLParser.java:1120)
      xmlis/CXmlParse.parseSax(Ljava/lang/String;)V+0 (CXmlParse.java:480)
      xmlis/CXmlParse.main([Ljava/lang/String;)V+0 (CXmlParse.java:98)

TIA,
Patrick