Can't set next-padding - it's ignoring me

[Anthony Youngman]

Well it was ... then I copied the example in the manual and it blows up
on me ...

I'm trying to globally over-ride the next-padding property to squeeze
more systems on a page (ie get the entire piece on one page and not have
an orphan system on page 2). There's an example in the manual about
using \outputProperty which I've copied but it refuses to work.

        \outputProperty #"Score.NonMusicalPaperColumn"
#'line-break-system-details #'((next-padding . 5))

I've tried it in the \score context, the \paper and the \layout context.
It blows up every time with "unrecognized escaped string
outputProperty". What am I doing wrong?

Cheers,
Wol

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