I don't know if with these steps it is 100% reproducible, but I hope they will help: EXEC: open fresh workspace in Eclipse Juno with JBT 4.0.0 Alpha1 installed EXEC: create new 7.1.1 runtime EXEC: create dynamic web project with 7.1.1 targeted runtime EXEC: restart eclipse (maybe more restarts are need to reproduce it) FAIL: there is error in error log: org.osgi.framework.BundleException: Exception in org.jboss.tools.runtime.ui.RuntimeUIActivator.stop() of bundle org.jboss.tools.runtime.ui. at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:791) at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510) at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:566) at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1207) at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:592) at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:257) at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:215) at org.eclipse.osgi.framework.internal.core.InternalSystemBundle.suspend(InternalSystemBundle.java:284) at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:693) at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:600) at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:399) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:199) 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:629) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584) at org.eclipse.equinox.launcher.Main.run(Main.java:1438) at org.eclipse.equinox.launcher.Main.main(Main.java:1414) Caused by: java.lang.NullPointerException at org.jboss.tools.runtime.ui.RuntimeUIActivator.saveRuntimePreferences(RuntimeUIActivator.java:281) at org.jboss.tools.runtime.ui.RuntimeUIActivator.stop(RuntimeUIActivator.java:141) at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764) ... 19 more Root exception: java.lang.NullPointerException at org.jboss.tools.runtime.ui.RuntimeUIActivator.saveRuntimePreferences(RuntimeUIActivator.java:281) at org.jboss.tools.runtime.ui.RuntimeUIActivator.stop(RuntimeUIActivator.java:141) at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764) at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510) at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:566) at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1207) at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:592) at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:257) at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:215) at org.eclipse.osgi.framework.internal.core.InternalSystemBundle.suspend(InternalSystemBundle.java:284) at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:693) at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:600) at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:399) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:199) 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:629) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584) at org.eclipse.equinox.launcher.Main.run(Main.java:1438) at org.eclipse.equinox.launcher.Main.main(Main.java:1414)