This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019 Gentoo Linux) (preloaded format=pdflatex 2020.2.15) 17 FEB 2020 16:31 entering extended mode restricted \write18 enabled. %&-line parsing enabled. **tesi.tex ! Emergency stop. <*> tesi.tex End of file on the terminal! Here is how much of TeX's memory you used: 3 strings out of 494553 112 string characters out of 6177841 52201 words of memory out of 5000000 3775 multiletter control sequences out of 15000+600000 3640 words of font info for 14 fonts, out of 8000000 for 9000 14 hyphenation exceptions out of 8191 0i,0n,0p,11b,6s stack positions out of 5000i,500n,10000p,200000b,80000s ! ==> Fatal error occurred, no output PDF file produced!