This is pdfTeX, Version 3.1415926-1.40.9 (MiKTeX 2.7) (preloaded format=pdflatex 2009.12.8) 9 DEC 2009 15:11 entering extended mode **intro.tex (intro.tex LaTeX2e <2005/12/01> Babel and hyphenation patterns for english, dumylang, nohyphenation, ge rman, ngerman, german-x-2008-06-18, ngerman-x-2008-06-18, french, loaded. ! Undefined control sequence. l.1 \section {Introduction} ? ! Emergency stop. l.1 \section {Introduction} End of file on the terminal! Here is how much of TeX's memory you used: 6 strings out of 95304 76 string characters out of 1183032 45021 words of memory out of 1500000 3306 multiletter control sequences out of 110000 3640 words of font info for 14 fonts, out of 3000000 for 5000 14 hyphenation exceptions out of 8191 5i,0n,1p,35b,8s stack positions out of 5000i,500n,10000p,200000b,50000s ! ==> Fatal error occurred, no output PDF file produced!