This issue is little bit harder to reproduce, you have to be pretty quick it is 100% reproducible. STEP: invoke context menu of some archive in project archive explorer STEP: click New Fileset and immediately after click press escape to close the dialog (has to be performed very quick) FAIL: Unhandled event loop exception thrown: org.eclipse.swt.SWTException: Failed to execute runnable (org.eclipse.swt.SWTException: Widget is disposed) at org.eclipse.swt.SWT.error(SWT.java:4373) at org.eclipse.swt.SWT.error(SWT.java:4288) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3680) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3329) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1057) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:941) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:79) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) 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:601) 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) Caused by: org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.swt.SWT.error(SWT.java:4373) at org.eclipse.swt.SWT.error(SWT.java:4288) at org.eclipse.swt.SWT.error(SWT.java:4259) at org.eclipse.swt.widgets.Widget.error(Widget.java:481) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:418) at org.eclipse.swt.widgets.Control.setEnabled(Control.java:4128) at org.jboss.ide.eclipse.archives.ui.util.composites.ArchiveSourceDestinationComposite.validateAndUpdateWidgets(ArchiveSourceDestinationComposite.java:228) at org.jboss.ide.eclipse.archives.ui.util.composites.ArchiveSourceDestinationComposite.init(ArchiveSourceDestinationComposite.java:320) at org.jboss.ide.eclipse.archives.ui.wizards.pages.FilesetInfoWizardPage.fillDefaults(FilesetInfoWizardPage.java:269) at org.jboss.ide.eclipse.archives.ui.wizards.pages.FilesetInfoWizardPage.access$6(FilesetInfoWizardPage.java:248) at org.jboss.ide.eclipse.archives.ui.wizards.pages.FilesetInfoWizardPage$1.run(FilesetInfoWizardPage.java:105) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) ... 24 more This is bug, because with others dialog (New Archive, New Folder, Edit Archive, Delete Archive, Publish to Server and Edit Publish Settings) my steps doesn't invoke any such a bug.