>>>>> "Peter" == Peter Chubb <[EMAIL PROTECTED]> writes:
..
Peter> lilypond: lily-guile.cc:176:
Peter> class String ly_scm2string(SCM): Assertion `gh_string_p (s)'
Peter> failed.

This is fixed if I do not set the Staff.instrument property, or if I
remove the \midi{} line (thanks Jan!)

However, if I do that, then
         1.  The noteheads in the tambour part still come out as
             filled ovals, not crosses.

         2.  Despite removing the clef engraver from the
             RhythmicStaff, a treble clef is still engraved.

(and whatever I do, the message
       `programming error: Huh? My children deflated (FIXME)
       (Continuing; cross thumbs)' 
still appears)

Peter C

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