Thanks for that solution. It is helpful to know that I can get things
to work in this way. However, I do wish I understood why this works
and my version doesn't - bearing in mind that my version does work
until I introduce /bookpart, yet the error messages produced by
Lilypond don't obviously relate to that.
What is also curious is this. I understand that introducing Scheme
code with '#' or '$' affects at what point the code is run. Your
version works in both cases. My version works in neither case,
although only the '$' version produces the error messages. Using the
'#' version there are no errors apparently, but still no output file is
produced.
Molto misterioso!
David
On Tue, 2016-12-20 at 22:36 +0000, Timothy Lanfear wrote:
> How about this?
>
> \version "2.19.48"
>
> \language "english"
>
> printScore = ##t
> printMvtOne = ##t
> printMvtTwo = ##t
>
> #(if
> (and printScore
> (or printMvtOne printMvtTwo))
> (ly:parser-include-string "\\include \"testprint.ily\""))
>
>
> On 20/12/16 21:57, David Sumbler wrote:
> >
> > I am still experimenting with constructing a file structure which
> > makes
> > sense to me for more complex works. I have come quite a long way
> > with
> > it and discovered some interesting things.
> >
> > But \bookpart seems to cause problems.
> >
> > The following works:
> >
> > File: test.ly
> > %%%%%
> > \version "2.19.48"
> >
> > \language "english"
> >
> > printScore = ##t
> > printMvtOne = ##t
> > printMvtTwo = ##t
> >
> > $(if
> > (and printScore
> > (or printMvtOne printMvtTwo))
> > #{ \include "testprint.ily" #} )
> > %%%%%
> >
> > File: testprint.ily
> > %%%%%
> > \version "2.19.48"
> >
> > \book {
> > \score { c }
> > }
> > %%%%%
> >
> > Modify the second file thus:
> >
> > File: testprint.ily
> > %%%%%
> > \version "2.19.48"
> >
> > \book {
> > \bookpart {
> > \score { c }
> > }
> > }
> > %%%%%
> >
> > This no longer works, but gives the following error messages:
> >
> > Parsing.../usr/local/lilypond/usr/share/lilypond/current/scm/lily-
> > library.scm:243:5: In procedure ly:book-process in expression
> > (process-procedure book paper ...):
> > /usr/local/lilypond/usr/share/lilypond/current/scm/lily-
> > library.scm:243:5: Wrong type (expecting real number): #<undefined>
> >
> > Once again I am finding that the use of \bookpart is giving
> > problems. I don't know if this is once again somehow connected
> > with the fact that bookparts have no variable scope, but it's a
> > damn nuisance anyway!
> >
> > Any suggestions?
> >
> > David
> >
> >
> > _______________________________________________
> > lilypond-user mailing list
> > lilypond-user@gnu.org
> > https://lists.gnu.org/mailman/listinfo/lilypond-user
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