Testing an XQuery Transformation

I'm using Workshop for Weblogic and I'm testing an XQuery Transformation. Both MFL and XSD are valid. But the XQuery doesn't seem to work... it gives me this error:

Error occurred while executing XQuery: loader constraint violation: when resolving method "javax.xml.stream.XMLInputFactory.createXMLStreamReader(Ljava/io/Reader;)Ljavax/xml/stream/XMLStreamReader;" the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the current class, weblogic/xml/query/parsers/StAXCursorAdaptor, and the cla开发者_C百科ss loader (instance of ) for resolved class, javax/xml/stream/XMLInputFactory, have different Class objects for the type javax/xml/stream/XMLStreamReader used in the signature

Have you ever seen this before? How can I solve this please?

You need to reinstall workshop with default JRockit, or what is much faster just edit workshop.ini and change -vm parameter value from Sun/Oracle JDK to JRockit SDK which can be found in weblogic directory.