On Sun, 21 Mar 2021 at 22:15, Roeland Visscher <
roelandvisscher@orange.fr> wrote:
>
> The appended .ly file, using a acciaccatura as first element of an alternative, generates the warning message (in French) “Avertissement : extension de reprise déjà présente, fin prématurée de celle-ci”
>
> and a weird representation of the alternatives in the generated score.
>
> Behaviour is normal if there is only one staff, or if both staffs have an acciaccatura at start of the alternative.
>
> Anything wrong with my script?
>
> Software bug?
>
> Workaround?
Hello Roeland,
This is an instance of issue 34.
You need to put \grace s8 in the other staves.
See NR 1.2.6 Special rhythmic concerns > Grace notes > Known issues and warnings
Cheers,
Xavier
PS : Do you know that there is a LilyPond French-speaking list? lilypond-user-fr