Thanks for the help Mark et al.
But there is no \partial there in the source code, hence my problem. With the source as shown in my original post the resulting PDF shows a partial and bar lines struck through beams, which is absurd in this context.
\version "2.18.2"
% automatically converted by musicxml2ly from test.xml
\header {
source = "
https://www.ibiblio.org/fiddlers/FARG_FAY.htmPaul O'Shaughnessy"
encoder = "abc2xml version 226"
encodingdate = "2021-02-16"
composer = "Father Patrick Joseph Kelly"
title = "Lough Derg Jig"
}
\override Staff.BarLine.stencil = ##f
lough_derg_jig = \relative d' {
\tempo 4 = 120
\repeat volta 2 {
\key g \major \time 6/8 %%| % 1
\partial 8*1 d8^"PART A" %!*5 %%| % 3
g8 [ fis8 g8 ] b8 [ a8 g8 ] %%| % 4
fis4 g8 a8 [ fis8 d8 ] %%| % 5
g8 [ fis8 g8 ] b8 [ a8 g8 ] %%| % 6
b8 [ d8 b8 ] c8 [ a8 fis8 ] %%| % 7
g4 c8 b8 [ a8 g8 ] %%| % 8
fis4. a8 [ fis8 d8 ] %%| % 9
d'8 [ cis8 d8 ] fis8 [ e8 d8 ] %%| \barNumberCheck #10
c8 [ a8 fis8 ] g4
}
\break
\repeat volta 2 {
\partial 8*1 a8^"PART B" %!*5 %%| % 13
b4 d8 g8 [ d8 b8 ] %%| % 14
d8 [ g8 b,8 ] d8 [ g8 b,8 ] %%| % 15
c4 e8 g8 [ e8 c8 ] %%| % 16
e8 [ g8 c,8 ] e8 [ g8 e8 ] %%| % 17
d4 fis8 a8 [ fis8 d8 ] %%| % 18
fis8 [ a8 d,8 ] fis8 [ a8 d,8 ]
}
\alternative {
{g8 [ fis8 g8 ] e8 [ fis8 g8 ]
a8 [ fis8 d8 ] c8 b4 }
{d8 [ cis8 d8 ] fis8 [ e8 d8 ]
c8 [ a8 fis8 ] g4. }
}
\break
\repeat volta 2 {
\partial 8*1 c8
\repeat volta 2 {
b4.^"PART C" b8 g e
fis4 g8 a fis e
}
\alternative {
{b' d b g a g
b d b c a fis}
{d' cis d fis e d
c a fis g4.}
}
}
}
% The score definition
lough_derg_jig_chords = \chordmode {
\set noChordSymbol = ""
}
lough_derg_jig_final = {
<<
\new ChordNames {
\set chordChanges = ##t
\lough_derg_jig_chords
}
\new Voice = "one" { \lough_derg_jig}
>>
}
\score {
\lough_derg_jig_final
\header {
piece = "lough_derg_jig"
}
\layout {
indent = #0
line-width = #180
ragged-last = ##t
}
}
\score {
\unfoldRepeats
{
\lough_derg_jig_final
\lough_derg_jig_final
\lough_derg_jig_final
}
\midi{}
}
\markup{filename:
lough.derg.jig.ly}