Harmonics again :-)

[Sophie Benéteau]

Hello,

Thanks for having fixed the accidentals with harmonics :-)
I experience another problem with \harmonic, using this source :

\score {
  \notes \relative c'' {
  a2 d
  a d\harmonic
  }
  \paper { }
}

I get the following message :

lilypond (GNU LilyPond) 2.1.34
Running usr...
Now processing `test.ly'
Parsing...
Interpreting music...
/home/alex/documents/partitions/test.ly:4:13: warning: Junking event: 
`HarmonicEvent':
  a d\harmoni
             c
[3]
Preprocessing graphical objects...
Calculating line breaks...

I would like the last d to be displayed with an harmonic head...(common way to 
indicate to a violin to produce that d by lightly touching it on the D string)

TIA,

        Alex.