If a service/reference interface is changed in Properties tab an exception is thrown. In some cases a dialog containing the exception is shown every time when clicking on something. That makes impossible to continue with work in the editor, so it has to be closed and reopened. Changing of an interface via Properties dialog works fine.

Stack trace:
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:374)
at org.eclipse.soa.sca.sca1_1.model.sca.impl.JavaInterfaceImpl.setInterface(JavaInterfaceImpl.java:171)
at org.switchyard.tools.ui.common.impl.JavaInterfaceControlAdapter.init(JavaInterfaceControlAdapter.java:79)
at org.switchyard.tools.ui.common.InterfaceControl.init(InterfaceControl.java:419)
at org.switchyard.tools.ui.editor.property.intfc.InterfaceControlComposite.refresh(InterfaceControlComposite.java:89)
at org.switchyard.tools.ui.editor.property.AbstractTabbedPropertySection.refresh(AbstractTabbedPropertySection.java:107)
at org.switchyard.tools.ui.editor.property.AbstractTabbedPropertySection.resourceSetChanged(AbstractTabbedPropertySection.java:165)
at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl$1.run(TransactionalEditingDomainImpl.java:781)
at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.runExclusive(TransactionalEditingDomainImpl.java:328)
at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.postcommit(TransactionalEditingDomainImpl.java:771)
at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.deactivate(TransactionalEditingDomainImpl.java:543)
at org.eclipse.emf.transaction.impl.TransactionImpl.close(TransactionImpl.java:712)
at org.eclipse.emf.transaction.impl.TransactionImpl.commit(TransactionImpl.java:474)
at org.eclipse.emf.workspace.AbstractEMFOperation.execute(AbstractEMFOperation.java:155)
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:84)
at org.eclipse.emf.transaction.impl.AbstractTransactionalCommandStack.execute(AbstractTransactionalCommandStack.java:219)
at org.switchyard.tools.ui.editor.property.AbstractModelComposite.wrapOperation(AbstractModelComposite.java:118)
at org.switchyard.tools.ui.editor.property.intfc.InterfaceControlComposite.access$3(InterfaceControlComposite.java:1)
at org.switchyard.tools.ui.editor.property.intfc.InterfaceControlComposite$1.selectionChanged(InterfaceControlComposite.java:67)
at org.switchyard.tools.ui.common.InterfaceControl.fireSelectionChanged(InterfaceControl.java:453)
at org.switchyard.tools.ui.common.InterfaceControl.access$3(InterfaceControl.java:448)
at org.switchyard.tools.ui.common.InterfaceControl$5.modifyText(InterfaceControl.java:298)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:179)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1392)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1416)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1397)
at org.eclipse.swt.widgets.Text.setText(Text.java:2508)
at org.eclipse.swt.widgets.Text.setText(Text.java:2438)
at org.switchyard.tools.ui.common.InterfaceControl.handleBrowse(InterfaceControl.java:485)
at org.switchyard.tools.ui.common.InterfaceControl.access$4(InterfaceControl.java:483)
at org.switchyard.tools.ui.common.InterfaceControl$6.widgetSelected(InterfaceControl.java:309)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1392)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3742)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3363)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
at org.eclipse.equinox.launcher.Main.main(Main.java:1426)