Dear Tihomir,

Thanks, I shall give a try. 

 
I created the Drools BPMN flow diagram, and can run it under Eclipse with no problem, but once I
added to Guvnor, the diagram is not shown up in Oryx in Guvnor.  I tried the function 'Shown BPMN 2.0 DI XML'.
I got the following error.  

enclosed is the flow:
<a href="http://drools-java-rules-engine.46999.n3.nabble.com/file/n2463094/ruleflow-mail-human.bpmn" target="_top">ruleflow-mail-human.bpmn</a>
I had also tried a simple one, the same error
<a href="http://drools-java-rules-engine.46999.n3.nabble.com/file/n2463094/test.bpmn" target="_top">test.bpmn</a>

javax.xml.bind.PropertyException: name: com.sun.xml.bind.namespacePrefixMapper value: de.hpi.bpmn2_0.transformation.BPMNPrefixMapper@15b08736
	at javax.xml.bind.helpers.AbstractMarshallerImpl.setProperty(AbstractMarshallerImpl.java:358)
	at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.setProperty(MarshallerImpl.java:532)
	at org.oryxeditor.server.Bpmn2_0Servlet.performTransformationToDi(Bpmn2_0Servlet.java:127)
	at org.oryxeditor.server.Bpmn2_0Servlet.doPost(Bpmn2_0Servlet.java:78)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:636)

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