That was it. I was unaware of that bug. It took me a few tries to get it working correctly -- as I have different numbers of grace notes, which also required copying the spacers to measures with fewer grace notes and matching correct number of 'events' -- but I think I got it sorted out!
On Tuesday, January 9, 2024 1:14:52 AM PST Richard Shann wrote: > On Mon, 2024-01-08 at 16:16 -0800, Donald J. Stewart wrote: > > When I insert grace notes at the beginning of a piece with multiple > > staves, I > > get a very strange error. > > This is a notorious LilyPond bug called "Issue 34" (*) > Use > Command: Install Grace Note Hint > Installs grace note spacer rests in other voices to work around a > problem with typesetting grace notes with non-music objects that appear > at the same moment. > Location: Object Menu ▶ Notes/Rests ▶ Grace Notes > Internal Name: InstallGraceNoteHint > > To fix the problem. > Richard > (*)you can do an internet search for "lilypond issue 34" if you want to > get an idea of its notoriety. > > > I haven't had any grace note errors in other similar scores, but I > > also > > haven't started a piece with grace notes before. > > > > When I start a simple one line test score, the error doesn't seem to > > occur. > > > > I've attached screenshots and the denemo file. > > > > > > _____________________________________________ > > D o n a l d J S t e w a r t > > s o u n d - X