This is pdfTeXk, Version 3.1415926-1.40.9 (Web2C 7.5.7) (format=pdflatex 2008.12.28) 7 AUG 2010 12:18 entering extended mode %&-line parsing enabled. **stein-intro. ! Emergency stop. <*> stein-intro. End of file on the terminal! Here is how much of TeX's memory you used: 4 strings out of 493876 103 string characters out of 1150567 48901 words of memory out of 3000000 3379 multiletter control sequences out of 10000+50000 3640 words of font info for 14 fonts, out of 3000000 for 5000 714 hyphenation exceptions out of 8191 0i,0n,0p,1b,6s stack positions out of 5000i,500n,10000p,200000b,50000s ! ==> Fatal error occurred, no output PDF file produced!