Converting lilypond-output to gif/png

[Dominic Sacré]

Hi,

I'm trying to convert the postscript-file generated by lilypond to gifs or 
pngs using the ps-to-gifs.sh script, but it doesn't work. I always get the 
error messages below (and I get a similar error if I try to open the ps-file 
with gv or ghostview).

What exactly is the problem, and how do I solve it?

Thanks in advance,
Dominic

-------------------------------------------
~/lilypond/ > ps-to-gifs.sh test.ps
Can't find (or can't open) font file feta-nummer10.
Substituting font Courier for feta-nummer10.
Can't find (or can't open) font file n022003l.pfb.
Can't find (or can't open) font file NimbusMonL-Regu.
Can't find (or can't open) font file NimbusMonL-Regu.
Unable to substitute for font.
Error: /invalidfont in findfont
Operand stack:
   --nostringval--   --nostringval--   0.0   feta-nummer10   Font   
feta-nummer10   61687   feta-nummer10   --nostringval--   Courier   
NimbusMonL-Regu
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--   
--nostringval--   false   1   %stopped_push   1   3   %oparray_pop   
.runexec2   --nostringval--   --nostringval--   --nostringval--   2   
%stopped_push   --nostringval--   --nostringval--   --nostringval--   
--nostringval--   --nostringval--   --nostringval--   4   3   %oparray_pop   
5   3   %oparray_pop   --nostringval--   --nostringval--   --nostringval--   
8   4   %oparray_pop   --nostringval--   --nostringval--   %loop_continue   
--nostringval--   1   -1   1   --nostringval--   %for_neg_int_continue   
--nostringval--   --nostringval--
Dictionary stack:
   --dict:909/941(G)--   --dict:0/20(G)--   --dict:93/200(L)--   
--dict:16/23(G)--   --dict:909/941(G)--
Current allocation mode is local
Last OS error: 2
Current file position is 17964
GNU Ghostscript: Unrecoverable error, exit code 1
ls: ./test*ppm: No such file or directory