Error when closing a screen: "View not attached to window manager"

I've been working on my app for the past 2 months, and im about to finish it thanks to the help of many of you, but there's one last issue that haven't been able to solve yet, and i hope that maybe you could give me a hint of what's going on.

My app has 3 screens. Im using Screen1 as the manager screen (as explained on the Pura Vida web site: http://puravidaapps.com/manager.php). Between screens 1 and 2, I have no problems on going back and forth, but every time i try to get out out from screen 3, the app stops and closes. 

As suggested by Taifun on this same forum, i run logcat to see what was causing the failure, and the lines following the error are the following:

E/AndroidRuntime(  473): FATAL EXCEPTION: main

E/AndroidRuntime(  473): java.lang.IllegalArgumentException: View not attached to window manager

E/AndroidRuntime(  473):        at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:355)

E/AndroidRuntime(  473):        at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:200)

E/AndroidRuntime(  473):        at android.view.Window$LocalWindowManager.removeView(Window.java:432)

The only references i found on the internet where about the orientation of the screens im visiting, but is not the case here.

Any ideas what might be triggering this error?

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Solved! :)

There was a method taking to a fusion table the moment i was closing the screen. 

Thanks everybody for all the help, kindness and patience.

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