Vertical spacing: Was between-system-space deprecated?

[wjm]

You wrote:-
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I am interested in controlling the vertical spacing
within systems.
I recently migrated from 2.12.2 to 2.15.39 .
In my one lilypond score, the spacing between
systems changed greatly between the PDFs built with
these two versions
Online documentation v2.12, has a section that specifically
discusses this:
  4.4.2 Vertical spacing between systems
and discusses the use of the following four variables:
  between-system-space = 1.5\cm
  between-system-padding = #1
  ragged-bottom=##f
  ragged-last-bottom=##f
I started looking at the 2.14 documentation (the most
recent I could find at http://lilypond.org) and the title
of 4.4.2 was changed to:
   4.4.2 Explicit staff and system positioning
(which generally means the same thing) though now this
section includes no mention of the
between-system-space and between-system-padding
variables.
Are these four variables considered deprecated?
Thanks;
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Greetings Ivan,
Did you use convert.ly to 'upgrade' your lilypond score?

The following link might provide the information you require:-

http://lilypond.org/doc/v2.15/Documentation/notation-big-page.html#flexible-vertical-spacing-within-systems

That is section 4.4.1 - See Section 4.4.2 as well

Note that it is for LP v 2.15.41 but it should apply to 2.15.39

Hope this helps
Regards
Bill