This is pdfTeX, Version 3.1415926-1.40.10 (MiKTeX 2.8) (preloaded format=pdflatex 2012.11.26)  2 DEC 2012 20:17
entering extended mode
**N:/CURRENT_DESIGN/OVERALL/sec_cc.tex
(N:/CURRENT_DESIGN/OVERALL/sec_cc.tex
LaTeX2e <2009/09/24>
Babel <v3.8l> and hyphenation patterns for english, dumylang, nohyphenation, ge
rman, ngerman, german-x-2009-06-19, ngerman-x-2009-06-19, french, loaded.
! Undefined control sequence.
l.1 \subsection
               {Vertical Cross Section}
? 
! Emergency stop.
l.1 \subsection
               {Vertical Cross Section}
End of file on the terminal!

 
Here is how much of TeX's memory you used:
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 45037 words of memory out of 3000000
 3306 multiletter control sequences out of 15000+200000
 3640 words of font info for 14 fonts, out of 3000000 for 9000
 14 hyphenation exceptions out of 8191
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!  ==> Fatal error occurred, no output PDF file produced!