Scheme function and top-level markup

[Simon Albrecht]

Hello everyone,

I’m a bit surprised that the following doesn’t work and don’t know where 
to look for a solution.

%%%%%%%%%%%%%%%%%%%%%%%%% \version "2.23.9" pieceTitle = 
#(define-scheme-function (str) (markup?)    #{      \markup \huge $str 
     \noPageBreak    #}) \pieceTitle "I. Kyrie" { c'1 } 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Here are the error messages:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Parsing... 
/tmp/frescobaldi-0fy0zxi0/tmpkd3e8qov/document.ly:7:6: error: markup 
outside of text script or \lyricmode \markup \huge $str 
/tmp/frescobaldi-0fy0zxi0/tmpkd3e8qov/document.ly:11:1: error: error in 
#{ ... #} \pieceTitle "I. Kyrie" 
/tmp/frescobaldi-0fy0zxi0/tmpkd3e8qov/document.ly:11:1: error: bad 
expression type \pieceTitle "I. Kyrie" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

What can I do?

Best, Simon