Hi, When I was working on a project using Drools-flow, I had some problems with the "lane" and "laneset". 1. In eclipse, I used the Flow editor to create a process and add some swimlanes. When I tried to run it, it always had this error: org.xml.sax.SAXParseException: <lane> is after an invalid element: org.drools.xml.Handler Then I looked into the XML file and changed the following code: <laneSet> <lane name="Patient" > </lane> <lane name="Doctor" > </lane> </laneSet> to: <laneSet> <lane name="Patient" > </lane> </laneSet> <laneSet> <lane name="Doctor" > </lane> </laneSet> It worked. Could you explain why? 2. I created a process in the web-based oryx designer with a pool that contains several lanes. Then I imported this file in Eclipse, which cannot open it correctly because of the lane issue, since the format in oryx exported file is like this: <laneSet id="XXX"> <lane name="Patient" > </lane> <lane name="Doctor" > </lane> </laneSet> 3. The bpmn file I created in Eclipse, although validated to be correct, cannot be imported in Oryx. I am wondering whether it can be done this way. Could you kindly address my concerns? Thank you very much! Best regards, ---- Wen