# One source causing “empty bibliography” error [closed]

I'm writing a LaTeX document using biber for references. If I include the following in the .bib file:

@article{boschmassspec,
author={Fritz Bosch},
title={Schottky mass- and lifetime-spectrometry of unstable, stored ions},
journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
volume={36},
number={3},
pages={585},
url={http://stacks.iop.org/0953-4075/36/i=3/a=316},
year={2003},
}


then all of my references break: even the references that worked previously will all throw reference undefined warnings and fail to properly be presented (showing the cite key instead of the number), and I get the following:

main.tex:78: LaTeX Warning: Empty bibliography on input line 78.
main.tex: LaTeX Warning: There were undefined references.
main.tex: Package biblatex Warning: Please (re)run Biber on the file:(biblatex)                main(biblatex)                and rerun LaTeX afterwards.


I am compiling the document properly (pdflatex, biber, pdflatex, pdflatex) and everything works if this one reference is omitted from the .bib file. What's wrong with it?

EDIT:

Here is a minimal example that replicates the issue:

main.tex:

\documentclass[twoside,onecolumn,11pt,a4paper]{book}
\usepackage{amsmath}
\usepackage{fancyhdr}
\usepackage{graphicx}
\usepackage{units}
\usepackage{mathtools}
\usepackage{hyperref}
\usepackage{physics}
\usepackage{amssymb}
\usepackage{parskip}
\usepackage[backend=biber,style=numeric,sorting=none]{biblatex}

\begin{document}
\cite{akberetal}

\cite{boschmassspec}

\printbibliography
\end{document}


bibliography.bib:

% Encoding: UTF-8

@Article{akberetal,
author  = {Akber, A. and Reed, M. W. and Walker, P. M. and Litvinov, Yu. A. and Lane, G. J. and Kibedi, T. and Blaum, K. and Bosch, F. and Brandau, C. and Carroll, J. J. and et al.},
title   = {Increased isomeric lifetime of hydrogen-like Os192m},
journal = {Physical Review C},
year    = {2015},
volume  = {91},
number  = {3},
month   = {Mar},
doi     = {10.1103/physrevc.91.031301},
}

@article{boschmassspec,
author={Fritz Bosch},
title={Schottky mass- and lifetime-spectrometry of unstable, stored ions},
journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
volume={36},
number={3},
pages={585},
url={http://stacks.iop.org/0953-4075/36/i=3/a=316},
year={2003},
}
@Comment{jabref-meta: databaseType:bibtex;}


If compiled as provided, no references work properly. If compiled without the second reference, the first one works.

• Please provide a full MWEB that reproduces the problem. There is no problem with your entry. – David Purton Dec 14 '17 at 3:51
• The error persists in a clean directory. I do get this strange error in the .blg file though: [228] Utils.pm:185> ERROR - Data file 'bibliography.bib' cannot be read in encoding 'ascii': ascii "\xC2" does not map to Unicode at C:\Users\gohma\AppData\Local\Temp\par-676f686d61\cache-02947398048c143181ebb9c4e483433d2665ac35\inc\lib/File/Slurper.pm line 63. – user502382 Dec 14 '17 at 12:33
• @user502382 -- wild guess based on your last comment. the .blg file complains about something not being ascii. did you copy-and-paste this reference? the only suspicious characters i see are the ones that look like hyphens. sometimes an en-dash slips in, and that has a different (non-ascii) unicode. try deleting just the hyphens and retyping them. might not work, but easy to try. – barbara beeton Dec 14 '17 at 15:00
• I forgot about this post. I ended up getting it working; I think it was an issue with my own MiKTeX configuration. – user502382 Mar 3 '18 at 2:47
• I'm voting to close this question as off-topic because it was about a problem that vanished after updating MikTeX. The problem could not be reproduced on other machines and has also been solved on the OP's. – moewe Mar 10 '18 at 15:41