2.7.30 compile very long

[Martial]

Win2k
The compile is very very too long with the version 2.7.30 
for a partition of 24 pages  (473 measures)

Why the slash is anti-slash for GS_FONTPATH=C:\WINNT/fonts
.../...
DYLD_LIBRARY_PATH=C:/Program Files/LilyPond/usr/bin/../lib
GS_FONTPATH=C:\WINNT/fonts
GS_FONTPATH=C:/Program Files/LilyPond/usr/bin/../share/ghostscript/8.15/fonts
warning: no such directory: C:/Program
Files/LilyPond/usr/bin/../share/ghostscript/8.15/Resource for GS_LIB
.../..

---------- Capture Output ----------
"C:\Program Files\LilyPond\usr\bin\lilypond.exe" 
les_cris_de_paris_test2730.ly
Processing `les_cris_de_paris_test2730.ly'
Parsing...
Interpreting music... 
[8][16]
.../...
[444][447][450][453][456][459][462][465][466]
Interpreting music... 
MIDI output to `les_cris_de_paris_test2730.midi'...
Track... 
Calculating page breaks...
Layout output to `les_cris_de_paris_test2730.ps'...
Converting to `les_cris_de_paris_test2730.pdf'...

after 5mn no one pdf output.

---verbose output----
.../...
Converting to `les_cris_de_paris_test2730.pdf'...
Invoking `gs    -dCompatibilityLevel#1.4  -sPAPERSIZE#"a4" -dNOPAUSE -dBATCH
-r1200  -sDEVICE#pdfwrite -sOutputFile#"les_cris_de_paris_test2730.pdf" -c
.setpdfwrite -f "les_cris_de_paris_test2730.ps"'...
Process failed to respond; forcing abrupt termination...
Exit code: 1

The ps file with gsview and is good