🚀 go-pugleaf

I used the following {\def}'s in emTeX with no problem. I can latex 
and preview.

\def\ftir{{\sf F\kern-0.6ex\hbox{T}}\kern-0.15ex\hbox{\sc
                                           I}\kern-0.43ex\hbox{\sc R}}
\def\atr{{\sl A}\kern-0.6ex\hbox{\sc T}\kern-0.6ex\hbox{\sl R}}
\def\ftiratr{\ftir\kern-0.33ex{/}\kern-0.65ex{\atr}}

On RISK/6000, I ran both latex and dvips without any problem, but I could not
get any printout. The HPLJ postscript printer says the .ps file is in error.
What is the problem and what is the cure?

PS: I used dvips5.472. If I just get rid of the new commands defined above,
  printer works fine. I changed \def to \newcommand with no effect. 
 
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                                                          _                  
ky04@lehigh.edu                                         / _ \
KYu, BioProcessing Institute                          /\ _|_ /\
111 Lehigh University                                    /|\