Re: barcheck warning when using Timing.measurePosition in polyphonic music

[Nick Payne]

On 22/04/12 22:12, Federico Bruni wrote:
> Hi,
>
> just a nitpick...
>
> In NR 1.2.3, Upbeats, Known issues and warnings
> \set Timing.measurePosition is recommended instead of \partial when 
> the partial measure occurs after the beginning of the piece.
>
> Single voice music compiles fine and without warnings:
>
> \version "2.15.36"
>
> \relative c'' {
>   \time 4/4
>   \partial 2 g2 |
>   g1 |
>   \set Timing.measurePosition = #(ly:make-moment -2 4)
>   g2 |
>   g1 |
> }
>
>
> Polyphonic music compiles fine but I get a barcheck warning:
>
> \version "2.15.36"
>
> \new Staff <<
>   \new Voice = "first" \relative c'' {
>     \time 4/4
>     \partial 2 g2 |
>     g1 |
>     \set Timing.measurePosition = #(ly:make-moment -2 4)
>     g2 |
>     g1 |
>   }
>
>   \new Voice= "second" \relative c' {
>     \time 4/4
>     \partial 2
>     c2 |
>     c1 |
>     \set Timing.measurePosition = #(ly:make-moment -2 4)
>     c2 |
>     c1 |
>   }
> >>
>
> The warning is:
> warning: barcheck failed at: -1/2

If you replace

\set Timing.measurePosition = #(ly:make-moment -2 4)

with

\set Score.measureLength = #(ly:make-moment 2 4)

you don't get a barcheck error.

Nick