My preamble


%\usepackage[square, numbers, comma, sort&compress]{natbib}  % Use the "Natbib" style for the references in the Bibliography
\usepackage{verbatim}  % Needed for the "comment" environment to make LaTeX comments



then before the \end{document} I wrote


but nothing appears (the bibliography does not appear) and I get an error "empty bibliography on imput line 616".

Any help?

enter image description here

Maybe this helps

enter image description here

[0] Config.pm:304> INFO - This is Biber 2.12
[0] Config.pm:307> INFO - Logfile is 'output.blg'
[43] biber:315> INFO - === Sat Oct 19, 2019, 07:04:29
[75] Biber.pm:371> INFO - Reading 'output.bcf'
[180] Biber.pm:886> INFO - Using all citekeys in bib section 0
[204] Biber.pm:4093> INFO - Processing section 0
[217] Biber.pm:4254> INFO - Looking for bibtex format file 'bibl.bib' for section 0
[219] bibtex.pm:1523> INFO - LaTeX decoding ...
[229] bibtex.pm:1340> INFO - Found BibTeX data source 'bibl.bib'
[255] bibtex.pm:94> FATAL - Caught signal: SEGV
Likely your .bib has a very bad entry which causes libbtparse to crash: Operation not permitted
  • 4
    Did you run Biber? You need to compile your document with LaTeX, Biber, LaTeX, LaTeX (where LaTeX can be your favourite flavour of LaTeX: pdfLaTeX, XeLaTeX, LuaLaTeX). See tex.stackexchange.com/q/63852/35864 for a more in depth explanation. See tex.stackexchange.com/q/154751/35864 for help in getting your editor to run Biber for you.
    – moewe
    Oct 19, 2019 at 7:23
  • @moewe Thank you! I write it online in overleaf. Do you know where I can see the compiler I use?
    – 1123581321
    Oct 19, 2019 at 7:30
  • 1
    Overleaf automatically runs Biber for you. In that case there must be an error somewhere. Download the .blg file (shown in tex.stackexchange.com/q/462314/35864 for the .bbl) and post its complete contents here.
    – moewe
    Oct 19, 2019 at 7:32
  • 4
    Er, so what was the answer?
    – moewe
    Oct 19, 2019 at 8:46
  • 1
    Not sure if I understand correctly, but if you found the solution, please consider writing an answer below and accepting it so that other people can benefit from it as well.
    – moewe
    Oct 19, 2019 at 10:21

1 Answer 1


I have same problem (via Overleaf). As a background, I migrated my bibliography from natbib to biblatex with the reference items over 300. As far as I understand, biblatex in Overleaf uses biber as a default?

Then I tried to use bibtex as its backend

\usepackage**[backend=bibtex]**{biblatex}, and magically it works!

Hope this helps.

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