scheme score function

[Gianmaria Lari]

I created a simple scheme function with a single argument that works similarly to the score command:

\version "2.19.80"

mySc = #(define-scheme-function (music) (ly:music?)

           #{ 

             \score {

               $music

               \layout{}

             }

           #})

\mySc {a b c'}

This works as expected. But when I modify it to generates two scores, one layout and one midi, I have a compilation error.

\version "2.19.80"

mySc = #(define-scheme-function (music) (ly:music?)

           #{ 

             \score {

               $music

               \layout{}

             }

             \score {

               $music

               \midi{}

              }

           #})

\mySc {a b c'}

What's the problem and how can I fix it?

Thank you, g.