Re: Regarding \break and multimeasure rests

[Patrick Karl]

> 
> Message: 4
> Date: Wed, 6 Jul 2011 05:13:57 -0400
> From: "Hwaen Ch'uqi" <address@hidden>
> To: address@hidden
> Subject: Regarding \break and multimeasure rests.
> Message-ID:
>       <address@hidden>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Greetings All,
>         I am currently working on a composition for piano, four hands, and
> I have run into a bit of difficulty in terms of aligning Secondo and
> Primo parts. At a certain point in the score, Lily simply refuses to
> break at the command, even after instantiating `\\once \override
> Score.NonMusicalPaperColumn #'line-break-permission = ##f' directly
> within the music and after trying the more general direction in the
> layout block as shown below and in the Notation Reference itself. When
> compiling, I continually get the error, `warning: forced break was
> overridden by some other event, should you be using bar checks?' I
> should state that, earlier in the piece, there occur successful \break
> commands during a passage of multimeasure rests in both hands; the
> only difference there is that that passage takes place in the middle
> of the page, not at the beginning. I give what I believe to be the
> relevant code, the entire part being quite large; but I can supply the
> entire code if requested. Many thanks for any guidance!
> Hwaen Ch'uqi
> 
> P.S. To be extra clear, I am using version 2.14.1. After upgrading
> with `convert-ly -e', the final version number given is 2.14.0.
> 
> \version "2.14.0"
> 
> #(define-markup-command (four-hand-page layout props offset) (number?)
> (let* (
>   (two-hand (chain-assoc-get 'page:page-number-string props))
>   (four-hand (number->string (+ offset (* 2 (string->number two-hand))))))
>   (interpret-markup layout props four-hand)))
> 
> \paper{
>  #(set-paper-size "letter")
>  oddHeaderMarkup = \markup \fill-line {
>    \four-hand-page #0
>    ""
>  }
>  evenHeaderMarkup = ##f
>  tagline = ##f
> }
> 
> \header{
>  instrument = "Secondo"
> }
> 
> \score{
>  \new PianoStaff<<
>    \set PianoStaff.connectArpeggios = ##t
>    \new Staff = up{
>      \set Staff.extraNatural = ##f
>      \key c \major \time 4/4 \clef bass \relative{
>       R1*2
>       \break
>       \acciaccatura s8 R1*2
>       \break
>       R1*3
>      }
>    }
>    \new Staff = down{
>      \set Staff.extraNatural = ##f
>      \key c \major \time 4/4 \clef bass \relative{
>       R1
>       <c,, g'>8 r <c g'> r <c g'> r <c g'> r
>       \acciaccatura a'8 <c, g'>8 r <c g'> r <c g'> r <c g'> r
>       \acciaccatura aes'8 <c, g'>8 r <c g'> r <c g'> r <c aes'> r
>       <c g'>8 r <c g'> r <c g'> r <c aes'> r
>       <c g'> r <c aes'> r <c g'> r <c aes'> r
>       <c g'> r r2 <ges ges'>8 r
>      }
>    }
>>> 
>  \layout{
>    \context{
>      \Score
>      \override NonMusicalPaperColumn #'line-break-permission = ##f
>    }
>  }
> }

This is covered in the "Known Issues and warnings" at the end of Section 1.2.6: 
 "Special rhythmic concerns" in the Notation Manual.  The cure is to include 
"\acciaccatura s8" before the 2nd R1*2 in the upper staff, as shown above.