Hi Sergey,
the problem is: _screen.forms collection doesn´t have all windows opened. Try to modify a form. Open the DataEnvironment window. Edit some method (example: CursorAdapter.Init).
These screens doesn´t appears in _SCREEN.Forms collection, but you can close or access them through the menu window list.

So, I´m sure that have a way to do it, but I don´t know how...

Do you have another idea?

Thanks for your help.
Ricardo.