Using OCR font with ghostscript and a2ps

[Emma Francis]

-- 
Hi,
I'm trying to convert a text file to a tiff using ghostscript and a2ps 
and an OCR font, because I need to recover it using a scanner. However 
after configuring ghostscript to accept this new font, and using a 
prologue file which is as follows - 


Documentation
Uses a true type font used so that it can be easily recognised
EndDocumentation

% -- code follows this line --
%%IncludeResource: file base.ps
%%IncludeResource: file a2ps.hdr
%%BeginResource: procset a2ps-OCR_Clear-Prolog 2.0 1

/p {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Plain OCRAExtended bfs
  Show
} bind def

/sy {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Symbol Symbol bfs
  Show
} bind def

/k {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Keyword OCRAExtended bfs
  Show
} bind def

/K {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Keyword_strong OCRAExtended bfs
  Show
} bind def

/c {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Comment OCRAExtended bfs
  Show
} bind def

/C {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Comment_strong OCRAExtended bfs
  Show
} bind def

/l {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: Label Helvetica bfs
  Show
} bind def

/L {
  1 1 1 FG
  false BG
  false UL
  false BX 
%Face: Label_strong Helvetica bfs
  Show
} bind def

/str {
  0 0 0 FG
  false BG
  false UL
  false BX
%Face: String OCRAExtended bfs
  Show
} bind def

/e{
  1 1 1 FG
  false BG
  false UL
  false BX
%Face: Error Helvetica bfs
  Show
} bind def

%%EndResource
%%BeginSetup
% The font for line numbering
/f# /Helvetica findfont bfs .6 mul scalefont def
%%EndSetup

I'm using the latest version of a2ps(4.13) and ghostscript 8.00.
I get no errors with a2ps but when I run ghostscript it objects to 
minus signs and prints out - 

     Substituting .notdef for minus

I'm using a .pfa and a .afm to represent the font. I included an entry 
in the fontmaps of Ghostscript and a2ps, and the font exists in the 
fonts directory of both.

Any ideas what is going wrong?? Any help would be appreciated :)

Cheers,
Emma