Thanks. I'll try a hidden grace in the other voice to see what that produces.
Phil, good thing you asked me for a separate working example. When I wrote one up, I didn't get any errors (see my snippet below), just some collisions. As it turns out, I had this line in the original: \override Score.SpacingSpanner #'strict-grace-spacing = ##t Setting this to false fixes most of the problems, and eliminates the 'program error'. \version "2.13.51" \include "english.ly" \relative c' { \clef tenor \key a \major \time 6/8 4( 8-.) << { \grace fs'8 es8( ds es-.) } \\ { gs,4 b8} >> 4( \afterGrace 8-.) { fs'8 } << { es8( ds es-.) } \\ { gs,4 b8} >> 4( 8-.) << { \acciaccatura fs'8 es8( ds es-.) } \\ { gs,4 b8} >> 4( 8-.) << { \appoggiatura fs'8 es8( ds es-.) } \\ { gs,4 b8} >> << { s4. \acciaccatura fs'8 es8( ds es-.) } \\ { <a, fs'>4( 8-.) gs4 b8 } >> } -- View this message in context: http://old.nabble.com/Grace-notes-in-multiple-voices-%3C%3C-%7B%7D-%5C%5C-%7B%7D-%3E%3E-tp31020086p31020273.html Sent from the Gnu - Lilypond - User mailing list archive at Nabble.com. _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org http://lists.gnu.org/mailman/listinfo/lilypond-user