Interesting. I don't understand the '@' syntax -- been trying to look it up but so far to no avail.
Here's what I ended up with: #(begin (use-modules (guile-user)) (if (not(symbol? 'part)) (define part 0) ) (if (= part 0) (define partName "") (define partName (string-append "S" (number->string part))) ) ) which gives me a default value for "part" if not defined on the command line. The "partName" variable is used later: if non-null, the script will print parts instead of a full score, thus lilypond -o Hexany_Permutations hexany_permutations.ly lilypond -e "(define part 1)" -o Hexany_Permutations_S1 hexany_permutations.ly lilypond -e "(define part 2)" -o Hexany_Permutations_S2 hexany_permutations.ly lilypond -e "(define part 3)" -o Hexany_Permutations_S3 hexany_permutations.ly lilypond -e "(define part 4)" -o Hexany_Permutations_S4 hexany_permutations.ly lilypond -e "(define part 5)" -o Hexany_Permutations_S5 hexany_permutations.ly lilypond -e "(define part 6)" -o Hexany_Permutations_S6 hexany_permutations.ly which yields a PDF for the full score and a separate PDF for each part (where the instruments are designated as S1 through S6). I guess I could probably do it all in a single invocation, but I haven't gotten that far yet -- only been using Lilypond for about a week now. - Dave On Mon, Oct 19, 2020 at 6:22 PM Aaron Hill <lilyp...@hillvisions.com> wrote: > On 2020-10-19 2:45 pm, Jean Abou Samra wrote: > > You can ignore the warning that shows up > > (https://gitlab.com/lilypond/lilypond/-/issues/3613). > > You can avoid the warning by using the @ syntax: > > %%%% eval-scope.ly %%%% > \version "2.20.0" > #(format #t "\nvalue = ~s" > (false-if-exception (@ (guile-user) value))) > %%%% > > ==== > > lilypond eval-scope.ly > GNU LilyPond 2.20.0 > Processing `eval-scope.ly' > Parsing... > value = #f > Success: compilation successfully completed > > > lilypond -e "(define-public value 123)" eval-scope.ly > GNU LilyPond 2.20.0 > Processing `eval-scope.ly' > Parsing... > value = 123 > Success: compilation successfully completed > ==== > > > -- Aaron Hill > >