When I try to create a ButtonBar I get a NullPointer exception in the platform code:

%<——————–

[TRACE] D/TiApplication( 1117): payload={"value":"thread_namemain\nthread_id1\nerror_msgjava.lang.NullPointerException\n<<<<<<<<<<<<<<< STACK TRACE >>>>>>>>>>>>>>>\norg.appcelerator.titanium.TiProxy.setModelListener(TiProxy.java:107)\norg.appcelerator.titanium.proxy.TiViewProxy.realizeViews(TiViewProxy.java:232)\norg.appcelerator.titanium.proxy.TiViewProxy.handleGetView(TiViewProxy.java:223)\norg.appcelerator.titanium.proxy.TiViewProxy.getView(TiViewProxy.java:206)\norg.appcelerator.titanium.proxy.TiViewProxy.realizeViews(TiViewProxy.java:239)\nti.modules.titanium.ui.WindowProxy.handleMessage(WindowProxy.java:68)\nandroid.os.Handler.dispatchMessage(Handler.java:95)\nandroid.os.Looper.loop(Looper.java:123)\nandroid.app.ActivityThread.main(ActivityThread.java:4627)\njava.lang.reflect.Method.invokeNative(Native Method)\njava.lang.reflect.Method.invoke(Method.java:521)\ncom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)\ncom.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)\ndalvik.system.NativeStart.main(Native Method)\n"}
[TRACE] E/AndroidRuntime( 1117): FATAL EXCEPTION: main
[TRACE] E/AndroidRuntime( 1117): java.lang.NullPointerException
[TRACE] E/AndroidRuntime( 1117): at org.appcelerator.titanium.TiProxy.setModelListener(TiProxy.java:107)
[TRACE] E/AndroidRuntime( 1117): at org.appcelerator.titanium.proxy.TiViewProxy.realizeViews(TiViewProxy.java:232)
[TRACE] E/AndroidRuntime( 1117): at org.appcelerator.titanium.proxy.TiViewProxy.handleGetView(TiViewProxy.java:223)
[TRACE] E/AndroidRuntime( 1117): at org.appcelerator.titanium.proxy.TiViewProxy.getView(TiViewProxy.java:206)
[TRACE] E/AndroidRuntime( 1117): at org.appcelerator.titanium.proxy.TiViewProxy.realizeViews(TiViewProxy.java:239)
[TRACE] E/AndroidRuntime( 1117): at ti.modules.titanium.ui.WindowProxy.handleMessage(WindowProxy.java:68)
[TRACE] E/AndroidRuntime( 1117): at android.os.Handler.dispatchMessage(Handler.java:95)
[TRACE] E/AndroidRuntime( 1117): at android.os.Looper.loop(Looper.java:123)
[TRACE] E/AndroidRuntime( 1117): at android.app.ActivityThread.main(ActivityThread.java:4627)
[TRACE] E/AndroidRuntime( 1117): at java.lang.reflect.Method.invokeNative(Native Method)
[TRACE] E/AndroidRuntime( 1117): at java.lang.reflect.Method.invoke(Method.java:521)
[TRACE] E/AndroidRuntime( 1117): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
[TRACE] E/AndroidRuntime( 1117): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
[TRACE] E/AndroidRuntime( 1117): at dalvik.system.NativeStart.main(Native Method)
[TRACE] W/ActivityManager( 60): Force finishing activity com.tester/ti.modules.titanium.ui.TiTabActivity
[TRACE] W/ActivityManager( 60): Activity pause timeout for HistoryRecord{43f46240 com.tester/ti.modules.titanium.ui.TiTabActivity}
[TRACE] I/TiAnalyticsSvc( 1117): (Thread-10) [1354,3065] Sending 2 analytics events.
[TRACE] D/dalvikvm( 1117): GC_FOR_MALLOC freed 5465 objects / 387288 bytes in 93ms
[TRACE] D/dalvikvm( 1117): GC_FOR_MALLOC freed 1598 objects / 88728 bytes in 110ms
[TRACE] W/TiAnalyticsSvc( 1117): (Thread-10) [2318,5383] Stopping Analytics Service
[TRACE] W/ActivityManager( 60): Launch timeout has expired, giving up wake lock!
[TRACE] W/ActivityManager( 60): Activity idle timeout for HistoryRecord{43f46240 com.tester/ti.modules.titanium.ui.TiTabActivity}
[TRACE] W/ActivityManager( 60): Activity idle timeout for HistoryRecord{43e56790 com.tester/.TesterActivity}
[TRACE] D/dalvikvm( 115): GC_EXPLICIT freed 860 objects / 47840 bytes in 96ms
[TRACE] W/ActivityManager( 60): Activity destroy timeout for HistoryRecord{43f46240 com.tester/ti.modules.titanium.ui.TiTabActivity}
[TRACE] I/Process ( 1117): Sending signal. PID: 1117 SIG: 9
[TRACE] I/ActivityManager( 60): Process com.tester (pid 1117) has died.

%<——————–

code in app.js

// this sets the background color of the master UIView (when there are no windows/tab groups on it)
Titanium.UI.setBackgroundColor('#000');

// create tab group
var tabGroup = Titanium.UI.createTabGroup();

//
// create base UI tab and root window
//
var win1 = Titanium.UI.createWindow({
title:'Tab 1',
backgroundColor:'#fff'
});
var tab1 = Titanium.UI.createTab({
icon:'KS_nav_views.png',
title:'Tab 1',
window:win1
});

tabGroup.addTab(tab1);

var bb1 = Titanium.UI.createButtonBar({
labels:['One', 'Two', 'Three'],
backgroundColor:'#336699',
top:50,
height:25,
width:200
});
win1.add(bb1);

// open tab group
tabGroup.open();