Hi Koen, Thank you for your answer. I tried to build GPD via eclipse but have the following problems. First a addend the missing plugin dependency org.eclipse.jface.text and add the jar dom4j.jar to classpath. The then 6 new errors occur in JpdlContentProvider: - The method addEdges(Node, Element) in the type JpdlContentProvider is not applicable for the arguments (Node, Transition[], Element) - The method addNodes(NodeContainer, Element) in the type JpdlContentProvider is not applicable for the arguments (NodeContainer, NodeElement[], Element) - The type JpdlContentProvider must implement the inherited abstract method AbstractContentProvider.addEdges(Node, Element) - The type JpdlContentProvider must implement the inherited abstract method AbstractContentProvider.addNodes(NodeContainer, Element) - The type JpdlContentProvider must implement the inherited abstract method AbstractContentProvider.getEdgeSemanticElement(Node, Element, int) - The type JpdlContentProvider must implement the inherited abstract method AbstractContentProvider.getNodeSemanticElement(NodeContainer, Element, int) For me it looks like if there are some commits are missing to get all work. Regards Philipp View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4128187#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...