Removing Empty Stave

[Alberto Simões]

Hello

I have managed to remove empty staffs with:

     \context {
      \Staff \RemoveEmptyStaves
      \override VerticalAxisGroup #'remove-first = ##t
    }

but now I have a staff that doesn't disappear.
I imagine that's because the last measure is shared between a line where 
the measure is empty (and I expected it to be removed), and the next 
line, where the measure has a note.

Probably the solution is to force that measure to be divided in two 
measures...

but why not ask: is there any detail I might be forgetting?

Thank you
Alberto