Hello Paul,
this error occurs because the TrillPitchAccidental grob does not specify an
outside-slur property, so it warns and defaults to 'ignore.
To get rid of the warning specify a suitable value. Accidental uses 'inside,
if you do not want to change behaviour choose 'ignore. Here is a demo
The code below produces exactly the output that I expect. (It is extracted from
a very complex bit of notation - trust me that things like the way the grace
notes are written have a good reason in context.)
My concern is that as well as producing the expected output, it also generates
a warni
