I've become aware of some embarrassing mistakes in the score and in the piano part:
In bar 19 the first note on the left hand of the piano is C natural, the natural mark to prevent confusion with the C sharp in the right hand is missing.
In bar 20, in the piano part, the last note on the bass clef is B flat.
In bar 21, the first chord of the right hand is D flat, E flat, A flat, B flat. The flat symbol for the A is missing.
I'm sorry for any problems caused by this and I'm preparing a new score and parts with all the corrections. At the moment I'm working with the 'Ensamble Nuevo de México' who will perform the piece, I'll publish the revised score after that in case more typos come to light. Sorry again.
--Alexbasasa 15:40, 23 May 2011 (UTC)