Arrows failing in 3.15 DIAG command.

[Peter Olsen]

I'm new to lout, so please excuse me if this is a "well-known"
problem.

I am trying to use lout to create an illustration.  I think I've
used both the "picture" and "diag" modes correctly, but every time
I run the code below, my PostScript output device complains that
it has an "undefined in A".

I can't find any reason for this to be so.  I've looked at the
PostScript code, but I can find no obvious problems (and it's too
much to reverse engineer if it can possibly be avoided).

Thanks!

Peter Olsen

@SysInclude{ picture }
@SysInclude{ tbl }
@SysInclude{ diag }
@Illustration{
  @Diag {
//
  A::@Center { @Box paint {lightred} { Classified Multicast IP
Packet }}
        @DP @DP
  B::@Center address@hidden  {Network Encryption System}}
        @DP @DP
  C::@Center address@hidden paint {lightgray}
      address@hidden {Unclassified Encrypted Unicast IP Packet} @LLP
       @Center address@hidden paint {lightred} { Classified Multicast IP
Packet }}}}
@Arrow from {A} to {B}
@Arrow from {B} to {C}
}
@DP
@I This is a test illustration.}


--
Peter Olsen, 703-516-7304, address@hidden
"Engineering is the art of using a professional knowledge of
mathematics and the physical sciences to improve the quality of
life."