This is pTeX, Version p2.1.11, based on TeX, Version 3.14159 (EUC) (Web2C 7.3.1) (format=platex 2002.4.12)  20 JAN 2004 13:58
**abstruct.tex
(abstruct.tex
pLaTeX2e <2000/11/03>+0 (based on LaTeX2e <2000/06/01> patch level 0)

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.1 \begin{center}
                  
? 
! Emergency stop.
 ...                                              
                                                  
l.1 \begin{center}
                  
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

 
Here is how much of TeX's memory you used:
 4 strings out of 20654
 165 string characters out of 194715
 46370 words of memory out of 350001
 3195 multiletter control sequences out of 10000+15000
 7519 words of font info for 31 fonts, out of 400000 for 1000
 14 hyphenation exceptions out of 10000
 9i,0n,4p,36b,25s stack positions out of 3000i,100n,1500p,50000b,4000s
No pages of output.