Hello Werner, Thanks for responding.
As pointed out by Dan Eble in an email to me, I was applying the change of engravers to the wrong context. Once I moved my actions from the Staff to the Voice context, everything worked as expected. There is no issue to report, this was user error. Thanks, Marcus Marcus Redivo <marcus.red...@whimsica.ca> 1520 Lands End Rd, North Saanich, BC V8L 5L5 1-250-655-9238 > On Dec 22, 2024, at 9:51 PM, Werner LEMBERG <w...@gnu.org> wrote: > > >> I’m trying to use “\shiftDurations” to make a modern-style edition >> of some 15th century music. The duration changes are correct, but >> the Completion_heads_engraver is having trouble rendering the >> result. [...] > > Thanks for the report. Please create a new issue at > > https://gitlab.com/lilypond/lilypond/-/issues > > > Werner