This is e-TeX, Version 3.141592-2.2 (MiKTeX 2.4) (preloaded format=latex 2005.2.6) 19 MAR 2005 11:16 entering extended mode **E:/ntnu/klassisk_mekanikk/variasjon_Lagrange.TEX (E:/ntnu/klassisk_mekanikk/variasjon_Lagrange.TEX LaTeX2e <2003/12/01> Babel and hyphenation patterns for french, german, ngerman, danish, nor wegian, ukenglish, dumylang, nohyphenation, loaded. ! Undefined control sequence. l.1 \section {Variasjonsprinsipper og Lagranges ligninger} ? ! Emergency stop. l.1 \section {Variasjonsprinsipper og Lagranges ligninger} End of file on the terminal! Here is how much of TeX's memory you used: 7 strings out of 95878 184 string characters out of 1194431 44835 words of memory out of 1048577 3148 multiletter control sequences out of 60000 3640 words of font info for 14 fonts, out of 500000 for 1000 8 hyphenation exceptions out of 607 5i,0n,1p,105b,8s stack positions out of 1500i,500n,5000p,200000b,32768s No pages of output.