> OK, so I give this thing a try.
>
> * Running a freshly compiled Emacs from today's git.
>
> * Commenting out all LilyPond mode stuff from the `.emacs` file.
>
> * Installing 'geiser' and 'geiser-guile' as requested (using `M-x
> package-install`).
>
> * Cloning the 'lilypond-ts-mode' as requested (i.e., I'm using the
> git version of today), also adding
>
> (add-to-list 'load-path "... path to 'lilypond-ts-mode' repo ...")
> (require 'lilypond-ts-mode)
>
> to my `.emacs` file.
>
> * Setting
>
> '(geiser-guile-binary "/usr/local/opt/bin/guile")
>
> to find my guile binary, which is in a non-standard location.
> Executing `M-x geiser-guile` brings me a guile prompt, so it seems
> to work. Executing `M-x geiser`, then selecting 'lilypond-guile',
> though, responds with 'No prompt found!', but this is probably
> expected, I guess.
>
> Alas, if I now try to load an arbitrary `.ly` file, I get the error
>
> File mode specification error:
> (file-missing "Opening directory"
> "Datei oder Verzeichnis nicht gefunden"
> "/opt/bin")
>
> Directory `/opt/bin` doesn't exist on my openSUSE GNU/Linux box, and
> I have no idea where this comes from and what this is referring
> to...
>
> Please advise.
After updating my complete OS to a newer version, I still get this.
Saul, please help.
Werner