This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015) (preloaded format=pdflatex 2016.2.4)  11 FEB 2020 16:06
entering extended mode
 restricted \write18 enabled.
 file:line:error style messages enabled.
 %&-line parsing enabled.
**pcr.bib
(./pcr.bib
LaTeX2e <2015/01/01>
Babel <3.9l> and hyphenation patterns for 79 languages loaded.

./pcr.bib:2: LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.2 @
     misc{A03,
? 
./pcr.bib:2: Emergency stop.
 ...                                              
                                                  
l.2 @
     misc{A03,
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

 
Here is how much of TeX's memory you used:
 7 strings out of 493089
 248 string characters out of 6134843
 53199 words of memory out of 5000000
 3590 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 5i,0n,4p,26b,14s stack positions out of 5000i,500n,10000p,200000b,80000s
./pcr.bib:2:  ==> Fatal error occurred, no output PDF file produced!
