This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012/Debian) (format=pdflatex 2017.3.9) 28 JUL 2017 18:30 entering extended mode restricted \write18 enabled. %&-line parsing enabled. **Klausur-Topologie-II-SS-2017.tex ! Emergency stop. <*> Klausur-Topologie-II-SS-2017.tex *** (job aborted, file error in nonstop mode) Here is how much of TeX's memory you used: 3 strings out of 494898 129 string characters out of 3176259 45357 words of memory out of 7000000 3318 multiletter control sequences out of 15000+200000 3640 words of font info for 14 fonts, out of 3000000 for 9000 60 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!