This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4) (format=latex 2007.8.30) 17 DEC 2007 17:47 entering extended mode **\nonstopmode\input{07012008.tex} (./07012008.tex ! LaTeX Error: File `smfart.cls' not found. Type X to quit or to proceed, or enter new name. (Default extension: cls) Enter file name: ! Emergency stop. l.2 \usepackage {amsfonts, amssymb, amsmath, latexsym}^^M *** (cannot \read from terminal in nonstop modes) Here is how much of TeX's memory you used: 10 strings out of 94501 196 string characters out of 1175794 48348 words of memory out of 1000000 3276 multiletter control sequences out of 10000+50000 3640 words of font info for 14 fonts, out of 500000 for 2000 580 hyphenation exceptions out of 8191 11i,0n,7p,100b,8s stack positions out of 1500i,500n,5000p,200000b,5000s No pages of output.