DialogFragment mysterious Null Pointer Exception

I cannot seem to make head or tail from the stack trace eclipse is giving me. The code used to work. I am not sure what I changed. But now when I launch the dialog fragment, the app crashes with the following error log.

FATAL EXCEPTION: main
 Process: com.company.appname, PID: 8962
 java.lang.NullPointerException
    at android.support.v4.app.DialogFragment.onActivityCreated(DialogFragment.java:366)
    at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1508)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:958)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478)
    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:446)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5579)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
    at dalvik.system.NativeStart.main(Native Method)

My code is massive so I am not sure which portion to show. So maybe someone has seen this mysterious kind of crash with apparently no root in my code (i.e. since eclipse is not naming one)