Hey guys. Not sure if this is a bug or if it is just not supported, it appears with the current version of Drools 5 and JBoss Tools. If I open a brl created with the BRMS I get the following Exception in Eclipse: com.thoughtworks.xstream.mapper.CannotResolveClassException: nature : nature at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java :68) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyM apper.java:71) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAli asingMapper.java:88) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasin gMapper.java:86) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:96) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java :38) at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java :52) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .determineType(AbstractReflectionConverter.java:347) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .doUnmarshal(AbstractReflectionConverter.java:208) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .unmarshal(AbstractReflectionConverter.java:162) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.ja va:82) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(Abstra ctReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:76) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:60) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverte r.readItem(AbstractCollectionConverter.java:71) at com.thoughtworks.xstream.converters.collections.ArrayConverter.unmarshal(A rrayConverter.java:55) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.ja va:82) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(Abstra ctReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:76) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .unmarshallField(AbstractReflectionConverter.java:246) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .doUnmarshal(AbstractReflectionConverter.java:218) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .unmarshal(AbstractReflectionConverter.java:162) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.ja va:82) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(Abstra ctReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:76) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:60) at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverte r.readItem(AbstractCollectionConverter.java:71) at com.thoughtworks.xstream.converters.collections.ArrayConverter.unmarshal(A rrayConverter.java:55) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.ja va:82) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(Abstra ctReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:76) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .unmarshallField(AbstractReflectionConverter.java:246) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .doUnmarshal(AbstractReflectionConverter.java:218) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter .unmarshal(AbstractReflectionConverter.java:162) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.ja va:82) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(Abstra ctReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:76) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarsha ller.java:60) at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java :137) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(Ab stractTreeMarshallingStrategy.java:33) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:923) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:909) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:845) at org.drools.guvnor.server.util.BRXMLPersistence.unmarshal(BRXMLPersistence. java:83) at org.drools.eclipse.rulebuilder.editors.BrlPage.setModelXML(BrlPage.java:44 ) at org.drools.eclipse.rulebuilder.editors.RuleEditor.pageChange(RuleEditor.ja va:274) at org.eclipse.ui.part.MultiPageEditorPart.setActivePage(MultiPageEditorPart. java:973) at org.eclipse.ui.forms.editor.FormEditor.setActivePage(FormEditor.java:623) at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorP art.java:314) at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.j ava:661) at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:42 8) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartRefere nce.java:594) at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:266 ) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage. java:2820) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:27 29) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2721) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2673) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2668) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2652) at org.eclipse.ui.actions.OpenWithMenu.openEditor(OpenWithMenu.java:337) at org.eclipse.ui.actions.OpenWithMenu.access$0(OpenWithMenu.java:325) at org.eclipse.ui.actions.OpenWithMenu$2.handleEvent(OpenWithMenu.java:187) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:28 8) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490 ) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplicatio n.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.jav a:193) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplicatio n(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Eclipse AppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:38 6) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:17 9) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) at org.eclipse.equinox.launcher.Main.run(Main.java:1236) Thanks Bernd -- Unsere Seminare: <http://www.camunda.com/seminare/> www.camunda.com/seminare/ Blog: www.bpm-guide.de --------------------------------------------- camunda services GmbH - The Business Process Company Zossener Straße 55-58 - 10961 Berlin <http://www.camunda.com> www.camunda.com - <mailto:info@camunda.com> info(a)camunda.com --------------------------------------------- Bernd Rücker Geschäftsführer Telefon +49 +49 30 664040 901 Mobil +49 171 1473461 <mailto:bernd.ruecker@camunda.com> bernd.ruecker(a)camunda.com --------------------------------------------- Amtsgericht Charlottenburg: HRB 113230 B Geschäftsführer: Jakob Freund, Bernd Rücker --------------------------------------------- EJB-3-Buch: <http://www.ejbbuch.de/> http://www.ejbbuch.de/ BPMN-Buch: <http://www.hanser.de/buch.asp?isbn=978-3-446-41768-7> http://www.hanser.de/buch.asp?isbn=978-3-446-41768-7