Wrong Type Argument v3.0

[Will Oram]

Always bumping into a new one of these:

ERROR: In procedure -:
ERROR: Wrong type argument in position 1: #f

Today's instance was caused by trying to do phase one of a two-pass  
spacing dump on a very large 12 movement project in .11.20 in OS X.  
In this case, '-' was the only function name I got. Running with -- 
verbose was much more helpful:

Element count 59249.[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14] 
[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] 
[32][33][34][35]Backtrace:
In unknown file:
   ?:  6* [#<procedure {#f} (x)> "x.ly"]
In /Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/ 
lilypond/current/scm/lily.scm:
558:  7* [lilypond-file #<procedure {#f} (key failed-file)> "x.ly"]
570:  8  [catch ly-file-failed #<procedure {#f} ()> #<procedure {#f}  
(x . args)>]
In unknown file:
   ?:  9* [#<procedure {#f} ()>]
In /Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/ 
lilypond/current/scm/lily.scm:
571: 10* [ly:parse-file "x.ly"]
In unknown file:
   ?: 11* [print-book-with-defaults # #]
In /Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/ 
lilypond/current/scm/lily-library.scm:
  86: 12* (let* ((paper #) (layout #) (count #) ...) (if (not #)  
(set! count 0)) ...)
  99: 13  [ly:book-process #<Book> #< Output_def> #< Output_def> "x"]
In unknown file:
   ?: 14* [page-breaking-wrapper #<Paper_book>]
In /Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/ 
lilypond/current/scm/layout-page-layout.scm:
  30: 15* (let* (# #) (# paper pages) pages)
  32: 16* [post-process-pages #< Output_def> (# # # # ...)]
  38: 17  (if (ly:output-def-lookup layout # {#f}) (write-page- 
breaks pages))
In unknown file:
    ...
   ?: 18  (letrec ((handle-page #)) (for-each handle-page pages) ...)
In /Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/ 
lilypond/current/scm/layout-page-dump.scm:
147: 19* [for-each #<procedure handle-page (page)> (# # # # ...)]
In unknown file:
   ?: 20* [handle-page #]
In /Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/ 
lilypond/current/scm/layout-page-dump.scm:
  95: 21* (let* (# # # #) (# # # #) (# lines #t 0))
102: 22* [set-line-stretch! (# #) 228.239601259385 {#f}]
111: 23  (if (not (null? sorted-lines)) (let* (# # #) (# line  
# ...) ...))
    ...
120: 24  [set-line-stretch! (#) 228.239601259385 ...
124: 25* [- {#f} 0.0]

/Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/lilypond/ 
current/scm/layout-page-dump.scm:124:36: In procedure - in expression  
(- space-left stretch):
/Users/spamguy/LilyPond.app/Contents/Resources/bin/../share/lilypond/ 
current/scm/layout-page-dump.scm:124:36: Wrong type argument in  
position 1: #f


the morning lets you live
but not sleeping is too hard
----------------------------------------------------------
                       _   |  WILL ORAM
ASCII ribbon campaign ( )  |  spamguy (at) foxchange . com
 - against HTML email  X   |  wro1 (at) cwru . edu
             & vCards / \  |
                           |  AIM spamguy21
----------------------------------------------------------
(ABOVE: Magnetic poetry #1)