Bar numbers in unmetered music.

[AB]

Hi list,

for unmetered music, I'm using \cadenzaOn \cadenzaOff but \set
score.currentBarNumber seems not working.
I'm pretty sure I'm missin' something but what?

This is my lily-file:
----------------------
% code start

\version "2.11.21"
\include "english.ly"

\header {
        title="test"
        tagline=" "
        }
 
verseOne=\lyricmode
        {\tiny
        This is a test
        
        }

melody={\set melismaBusyProperties = #' ()
        \override Staff.TimeSignature #' transparent = ##t
        \time 5/4
        \clef violin
        \key d \major
        \transpose c c' {
        

        \cadenzaOn
        
        e4 e e e a      \bar "|" 
        cs2 e   a4      \bar "|" \break

        \set Score.currentBarNumber = #5

        d4 d d          \bar "|"
        cs4 d cs e d    \bar"|."

        \cadenzaOff
        } }

\score  {
        <<
        \new Voice= "one" {\melody}
        \new Lyrics \lyricsto "one" \verseOne
        >>
        } 
% end code
-----------------

The output is fine, except for the missing bar number.
Hope this isn't too silly question but I'm a beginner.
Thanks in advance for help.

Cheers.
AB