Jim Morris [https://community.jboss.org/people/jimmorris] created the discussion "Open of saved BPMN2 file fails in Eclipse" To view the discussion, visit: https://community.jboss.org/message/733464#733464 -------------------------------------------------------------- Hi,  I'm trying to evalute using jBPM as an embedded component for our application. Using the 5.2 demo download I created a process in Eclipse that was originally in web designer.  Web designer was way too slow for real work.  Twice now I can't re-open the file after shutting down and restarting Eclipse (via Ant start.demo) I validated before saving, although that shouldn't be required.  First I get a message like "unknown gateway direction".  I manually edit the XML and add gatewayDirection="Diverging" to the <bpmn2:exclusiveGateway> tag missing the direction then I get error: "Could not open the editor: Unknown model object null" Details: java.lang.IllegalArgumentException: Unknown model object null     at org.drools.eclipse.flow.ruleflow.editor.editpart.RuleFlowEditPartFactory.createEditPart(RuleFlowEditPartFactory.java:94)     at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setContents(AbstractEditPartViewer.java:626)     at org.drools.eclipse.flow.common.editor.GenericModelEditor.initializeGraphicalViewer(GenericModelEditor.java:175)     at org.eclipse.gef.ui.parts.GraphicalEditor.createGraphicalViewer(GraphicalEditor.java:158)     at org.eclipse.gef.ui.parts.GraphicalEditorWithPalette.createPartControl(GraphicalEditorWithPalette.java:63)     at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:670)     at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:465)     at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)     at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:289)     at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2863)     at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2768)     at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2760)     at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2711)     at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)     at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2707)     at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2691)     at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2682) ... Any fix for this type of error. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/733464#733464] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]