I am using and extending bpmn2 plugin.
there is a bug if you open a editor for .bpmn file, and then right click on this editor tap -> new editor
it open the 2. editor for the same file, but just the first opened editor won't work anymore
!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2012-04-19 08:01:34.318
!MESSAGE Cannot modify resource set without a write transaction
!STACK 0
java.lang.IllegalStateException: Cannot modify resource set without a write transaction
at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.assertWriting(TransactionChangeRecorder.java:348)
at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.appendNotification(TransactionChangeRecorder.java:302)
at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.processObjectNotification(TransactionChangeRecorder.java:284)
at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.notifyChanged(TransactionChangeRecorder.java:240)
at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:380)
at org.eclipse.dd.dc.impl.PointImpl.setX(PointImpl.java:116)
at org.eclipse.bpmn2.modeler.core.utils.AnchorUtil.updateEdge(AnchorUtil.java:404)
at org.eclipse.bpmn2.modeler.core.utils.AnchorUtil.reConnect(AnchorUtil.java:375)
at org.eclipse.bpmn2.modeler.core.features.DefaultLayoutBPMNShapeFeature.layoutConnections(DefaultLayoutBPMNShapeFeature.java:43)
at org.eclipse.bpmn2.modeler.core.features.DefaultLayoutBPMNShapeFeature.layout(DefaultLayoutBPMNShapeFeature.java:28)
at org.eclipse.bpmn2.modeler.ui.features.LayoutBaseElementTextFeature.layout(LayoutBaseElementTextFeature.java:61)
at org.eclipse.bpmn2.modeler.core.di.DIImport.layoutAll(DIImport.java:177)
at org.eclipse.bpmn2.modeler.core.di.DIImport.access$5(DIImport.java:153)
at org.eclipse.bpmn2.modeler.core.di.DIImport$1.doExecute(DIImport.java:147)
at org.eclipse.emf.transaction.RecordingCommand.execute(RecordingCommand.java:135)
at org.eclipse.graphiti.ui.internal.editor.GFWorkspaceCommandStackImpl.execute(GFWorkspaceCommandStackImpl.java:90)
at org.eclipse.emf.transaction.impl.AbstractTransactionalCommandStack.execute(AbstractTransactionalCommandStack.java:219)
at org.eclipse.bpmn2.modeler.core.di.DIImport.generateFromDI(DIImport.java:108)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2Editor.importDiagram(BPMN2Editor.java:330)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2Editor.access$0(BPMN2Editor.java:310)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2Editor$1.doExecute(BPMN2Editor.java:302)
at org.eclipse.emf.transaction.RecordingCommand.execute(RecordingCommand.java:135)
at org.eclipse.emf.workspace.EMFCommandOperation.doExecute(EMFCommandOperation.java:119)
at org.eclipse.emf.workspace.AbstractEMFOperation.execute(AbstractEMFOperation.java:150)
at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:513)
at org.eclipse.emf.workspace.impl.WorkspaceCommandStackImpl.doExecute(WorkspaceCommandStackImpl.java:208)
at org.eclipse.emf.transaction.impl.AbstractTransactionalCommandStack.execute(AbstractTransactionalCommandStack.java:165)
at org.eclipse.graphiti.ui.internal.editor.GFWorkspaceCommandStackImpl.execute(GFWorkspaceCommandStackImpl.java:71)
at org.eclipse.emf.transaction.impl.AbstractTransactionalCommandStack.execute(AbstractTransactionalCommandStack.java:219)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2Editor.setInput(BPMN2Editor.java:298)
at org.eclipse.gef.ui.parts.GraphicalEditor.init(GraphicalEditor.java:346)
at org.eclipse.graphiti.ui.internal.editor.DiagramEditorInternal.init(DiagramEditorInternal.java:1093)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2Editor.init(BPMN2Editor.java:197)
at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:237)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2MultiPageEditor.createDesignEditor(BPMN2MultiPageEditor.java:244)
at org.eclipse.bpmn2.modeler.ui.editor.BPMN2MultiPageEditor.createPages(BPMN2MultiPageEditor.java:232)
at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:348)
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:2945)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2850)
at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2842)
at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2793)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2789)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2773)
at org.eclipse.ui.internal.handlers.NewEditorHandler.execute(NewEditorHandler.java:65)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241)
at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
