# Biblatex and authoryear broken but why? [closed]

After a reinstallation of a newer version of MiKTeX the citations created by biblatex are broken. I have no idea what causes this. A similar issue could be fixed by deleting all auxillary files but that does not help here.

Here is my non-working MWE:

\documentclass{article}

\usepackage{filecontents}
\begin{filecontents*}{test.bib}
@BOOK{test,
author= {A. Author},
title = {A Title for a Book},
date = {2012-10-08}
},
@ONLINE{test2,
author = {A. Author},
title = {Some title},
url = {http://example.com},
urldate = {2013-01-08}
}
\end{filecontents*}

\usepackage[%
backend=biber,
citestyle=authoryear,
bibstyle=authoryear,
]{biblatex}

\begin{document}
Here is a first citation: \cite{test}.
\nocite{*}

\printbibliography
\end{document}


With the output:

Here is a first citation: A Title for a Book.

References

Author, A. Some title. url: http://example.com (visited on 01/08/2013).

A Title for a Book.

How can I get the normal citations back?

## closed as too localized by Alexander, barbara beeton, egreg, Claudio Fiandrino, QrrbrbirlbelJun 25 '13 at 16:42

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• What do the logs say (*.blg, *.log)? – Audrey Jun 25 '13 at 13:21
• @Audrey: Oh, I found something that might be a hint: the .blg contains: [115] Utils.pm:167> WARN - Warning: Found biblatex control file version 2.4, expected version 2.3 and the .log: Package biblatex Warning: File 'no_month.bbl' is wrong format version - expected 2.2. This is all on an uptodate MiKTeX 2.9 install. – Alexander Jun 25 '13 at 13:27
• @Audrey: That turned out to be a great hint. It seems that MiKTeX is going through some restructuring at the moment. It installed biblatex 2.6 together with biber 1.5. This causes the error. Installing a newer biber 1.6 by hand fixes the issue. Thank you! – Alexander Jun 25 '13 at 13:40
• No problem. biber 1.5 is indeed not compatible with biblatex 1.6. You can find a table of compatible versions in the biblatex manual. – Audrey Jun 25 '13 at 14:15
• I already have for some time biber 2.6 in a current miktex and I don't see any update in the manager which could revert this to biber 2.5. But if you have a 64bit miktex then it doesn't come with biber and you will have to update it manually everytime biblatex is updated. – Ulrike Fischer Jun 25 '13 at 14:24