Получение ошибки ClassNotFound после обновления с ADT 16 до ADT 17

Мое приложение работало нормально. Но как только я обновился с ADT 16 до ADT 17, я получаю эту ошибку

Unable to resolve superclass of Lcom/my/app/MyActivity; (130)
Link of class 'Lcom/my/app/MyActivity;' failed
D/AndroidRuntime(328): Shutting down VM
W/dalvikvm(328): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime(328): FATAL EXCEPTION: main
E/AndroidRuntime(328): java.lang.RuntimeException: Unable to instantiate activity     ComponentInfo{com.my.app/com.my.app.MyActivity}:   java.lang.ClassNotFoundException: com.my.app.MyActivity in loader   dalvik.system.PathClassLoader[/data/app/com.my.app-1.apk]
E/AndroidRuntime(328):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
E/AndroidRuntime(328):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E/AndroidRuntime(328):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
E/AndroidRuntime(328):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime(328):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(328):  at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(328):  at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime(328):  at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(328):  at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(328):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(328):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime(328):  at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(328): Caused by: java.lang.ClassNotFoundException: com.my.app.MyActivity in loader dalvik.system.PathClassLoader[/data/app/com.my.app-1.apk]
E/AndroidRuntime(328):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
E/AndroidRuntime(328):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
E/AndroidRuntime(328):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
E/AndroidRuntime(328):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
E/AndroidRuntime(328):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
E/AndroidRuntime(328):  ... 11 more

Как ее решить?