Emergency stop.
<*> Main_file.tex
*** (job aborted, no legal \end found)
Here is how much of TeX's memory you used:
13088 strings out of 492164
254952 string characters out of 6125314
329325 words of memory out of 5000000
17107 multiletter control sequences out of 15000+600000
12006 words of font info for 44 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
60i,12n,54p,634b,492s stack positions out of 5000i,500n,10000p,200000b,80000s
! ==> Fatal error occurred, no output PDF file produced!