ignoring between-system-padding

[jim altieri]

Hi,
 I'm going a little batty trying to fine-tune the vertical spacing on 
my score.  It's too complex to include here, but suffice to say, when I 
typeset the file, I get the following warning:
   warning: Can't fit systems on page -- ignoring between-system-padding
 What is the code equivalent of, "Please, LilyPond, stop ignoring me?"
 I'd really like it to use at least a certain padding between systems, 
otherwise use fewer systems per page.  As of now, I don't have explicit 
line or system breaks.
 I'm using 2.11.20, on MacOSX.
thanks,
jim altieri