wxPython 2.1.16

The wxPython 2.1.16 release removed 'Magic Methods'. These were special method names for events that did not have to be explicitly connected to the event. As of 2.1.16 these events no longer fire.

Until the next release of Boa (soon I promise) I suggest you use Boa with an earlier version.

If you want to fix this, hook up the close event in all frames that define the OnCloseWindow method, add the following to their __init__:

EVT_CLOSE(self, self.OnCloseWindow)