# Can somebody tell me what's wrong with this use of biblatex?

\documentclass[12pt]{article}
\usepackage[backend=biber, style=numeric, citestyle=numeric]{biblatex}
\usepackage[UKenglish]{babel}

\begin{document}
\maketitle

\section{Introduction}
mechanical development came, in equal measure, responses seeking to disprove
them, as was the formulation of the 'EPR Paradox' in response to Heisenberg and
Bohr's 'Copenhagen Interpretation' understanding of quantum mechanical variables
(in particular their uncertainties)\cite{Copenhagen},

\printbibliography
\end{document}


The file does work without the \printbibliography command, when present I get the error:

LaTeX Warning: No \author given.

! Undefined control sequence. zeitschrift f\x {fffd}\x {fffd}r physik; magazine for physics l.14 \end {document}

This leads me to believe there is an issue with my .bib file, which I cannot find:

% Encoding: UTF-8

@Book{QP,
publisher = {WILEY-VCH Verlag GmbH \& Co. KGaA},
year      = {2005},
author    = {Yakir Aharonov; Daniel Rohrlich},
editor    = {Yakir Aharonov; Daniel Rohrlich},
volume    = {25},
edition   = {3},
isbn      = {978-3-527-40391-2},
}

@Article{Copenhagen,
author  = {Werner Heisenberg},
title   = {ber den anschaulichen Inhalt der quantentheoretischen Kinematik
und Mechanik; The content of quantum theoretical kinematics and mechanics},
journal = {zeitschrift für physik; magazine for physics},
year    = {1927},
volume  = {43},
number  = {3-4},
pages   = {172-198},
}

@Article{EPR,
author  = {Albert Einstein; Boris Podolsky; Nathan Rosen},
title   = {Can Quantum-Mechanical Description of Reality Be Considered
Complete?},
journal = {Description of Physical Reality},
year    = {1935},
volume  = {47},
pages   = {777-780},
}

@Article{Bell,
author  = {John Bell},
title   = {ON THE EINSTEIN PODOLSKY ROSEN PARADOX},
journal = {Physics},
year    = {1964},
volume  = {1[I]},
pages   = {195-200},
}

@Article{BohmEPR,
author  = {David Bohm; Yakir Aharonov},
title   = {Discussion of Experimental Proof for the Paradox of
Einstein,
Rosen, and Podolsky},
journal = {PHYSICAL REVIEW},
year    = {1957},
volume  = {108},
pages   = {1070-1076},
}

@Misc{BellMath,
author       = {Mathpages},
title        = {Quantum Entanglement and Bell's Theorem},
howpublished = {Web Page},
note         =
{URL:http://www.mathpages.com/home/kmath521/kmath521.htm},
url          = {http://www.mathpages.com/home/kmath521/kmath521.htm},
}

@Article{ABeffect,
author  = {Yakir Aharonov; David Bohm},
title   = {Significance of electromagnetic potentials in quantum
theory},
journal = {Physical Review},
year    = {1959},
volume  = {115},
pages   = {485-491},
}

@Book{State,
title     = {Quantum Mechanics},
publisher = {John Wiley \& Sons. Inc},
year      = {1977},
author    = {Claude Cohen-Tannoudji; Bernard Diu; Franck Laloe},
editor    = {Claude Cohen-Tannoudji; Bernard Diu; Franck Laloe},
isbn      = {0-471-16433-X},
}

@Comment{jabref-meta: databaseType:bibtex;}

• Have you tried renaming your file so that it has no spaces and using it without spaces in your file? Spaces are evil... – TeXnician Jan 4 '18 at 16:25
• Can you be a bit more specific? Are there error messages or warnings in the log files? If so, what are they? – Ian Thompson Jan 4 '18 at 16:51
• @I.Auguste: Have you included biber in your processing sequence? That is, pdflatex > biber > pdflatex > pdflatex? – Werner Jan 4 '18 at 17:01
• @I.Auguste: I have no problems with this setup, which creates this output. Compiled with pdflatex > biber > pdflatex > pdflatex. – Werner Jan 4 '18 at 17:29
• For the authors in the bib file use Yakir Aharonov and David Bohm and not a comma separeted list – user2478 Jan 4 '18 at 18:28

For the error concerning the misbehaving bibliography I needed to run through Biber as follows: pdflatex > biber > pdflatex > pdflatex

without BibTex or MikTex running and without the \printbibliography commands, which can be added later instead

for the error concerning printing my bibliography I had square brackets and German within a title and Biblatex didn't like that

The problem is not exactly in your bibliography-file but in the way biblatex is called in your document.
Since your bibliography is encoded in UTF-8 and you use non-English charakters like "ü" in "Zeitschrift für Physik", you should also envoke biblatex with the option bibencoding=utf8.

Here is the MWE working for me with your PTP.bib:

\documentclass[12pt]{article}
\usepackage[backend=biber,bibencoding=utf8,style=numeric,citestyle=numeric]{biblatex}

\begin{document}
\maketitle

\section{Introduction}
mechanical development came, in equal measure, responses seeking to disprove
them, as was the formulation of the 'EPR Paradox' in response to Heisenberg and
Bohr's 'Copenhagen Interpretation' understanding of quantum mechanical variables
(in particular their uncertainties)\cite{Copenhagen},

\printbibliography
\end{document}


But please also consider the comments about correct author naming in .bib-files (AUTHOR1 and AUTHOR2 instead of AUTHOR1; AUTHOR2). bib(la)tex is very sensitive in regard to special characters within field values, in some contexts the names won't be printed correctly.

I rund the same code in my actual homework, but with backend=bibtex. Works under the same routine in Texworks. Sometimes I have problems running biber on a Mac. Some of my friends do use biber, but I do prefer bibtex.

• The program "bibtex" is a pain! It makes no difference running biber on Linus/Windows/Mac. With biber I can have a title Crème brûlêe in the bibfile. Compare it with the entry for bibtex ... – user2478 Jan 4 '18 at 19:50