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Failed to execute runnable (java.lang.NullPointerException)
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException) at org.eclipse.swt.SWT.error(SWT.java:4397) at org.eclipse.swt.SWT.error(SWT.java:4312) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3976) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3653) at org.eclipse.jface.window.Window.runEventLoop(Window.java:826) at org.eclipse.jface.window.Window.open(Window.java:802) at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.open(WorkbenchPreferenceDialog.java:215) at org.eclipse.ui.internal.handlers.ShowPreferencePageHandler.execute(ShowPreferencePageHandler.java:58) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:243) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:224) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:167) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:200) at org.eclipse.e4.ui.workbench.renderers.swt.cocoa.CocoaUIHandler.runCommand(CocoaUIHandler.java:716) at org.eclipse.e4.ui.workbench.renderers.swt.cocoa.CocoaUIHandler.access$6(CocoaUIHandler.java:704) at org.eclipse.e4.ui.workbench.renderers.swt.cocoa.CocoaUIHandler$8.widgetSelected(CocoaUIHandler.java:569) 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.Display.sendEvent(Display.java:4166) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1489) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1474) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4012) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3651) 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:140) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611) 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 com.appcelerator.titanium.rcp.IDEApplication.start(IDEApplication.java:126) 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:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) 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)Caused by: java.lang.NullPointerException at com.appcelerator.titanium.android.internal.ui.configuration.AndroidSDKComposite$1$1.run(AndroidSDKComposite.java:175) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) ... 54 more