Barikavily wrote
I'm not top posting.
% I wish to define layout properties for a bookpart block
% but it doesn't seem to work.
% Lilypond says "\paper is necessary".
% Am I missing something?
it is not possible to define a \layout block in a \book or a \bookpart.
according to Issue 3151
<https://code.google.com/p/lilypond/issues/detail?id=3151&can=1&q=Fixed_2_17_16&colspec=ID%20Type%20Status%20Stars%20Owner%20Patch%20Needs%20Summary>
the documentation has been fixed.
I found one example which may have been overseen:
3.1.3 Multiple output files from one input file
should this issue be re-opened?!
Eluze