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I've wrestled for days with this problem for days, and have looked at the forum for answers, but to no avail.

I have in my preamble:

\usepackage[utf]{inputenc}
\usepackage[english]{babel}
\usepackage[babel]{csquote}
\usepackage[notes,backend=bibtex]{biblatex-chicago}
\addbibresource{Bibliography.bib}

For the bibliography output I have:

\printbibliography

However, I keep getting this error:

Package hypperref Warning: Return to get /pagelabels entry.
(./main.bbl
./main.bbl:20: undefined control sequence.
\blx@slist@name ->\cms @choose/global/
l.20 \entry{*****}{article}{}
?

When I click on "Go to error", it takes me to my main.bbl file,

\sortlist[entry]{\cms@choose/global/}

\entry{*****}{article}{}

\field{labeltitlesource}{title}

\field{sortinit}{2}

\field{sortinithash}{2}

\field{title}{XTITLEOFARTICLEX}

\field{journaltitle}{{XJOURNALNAMEX}}

\field{month}{08}

\field{year}{2010}

\endentry

I'd be grateful for any help. I apologise if my question has not been posted in proper format, this is my first ever question.

Sajjad
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  • Welcome to TeX.SX! Please help us help you by post a full MWE with bibliography (including the problematic part). Also try to delete auxiliary files and compile again (or run bibtex again and show its output). – TeXnician Apr 17 '17 at 15:56
  • @TeXnician Thanks. I've tried to delete the auxiliary files. Didn't work. (And Unless the auxiliary files are somewhere I don't know.) I'll add what I think you mean by the problematic part. – Sajjad Apr 17 '17 at 21:07
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    It seems that biblatex-chicago doesn't work currently (or none at all) with the backend bibtex. Remove backend=bibtex and change in your editor to biber. – Ulrike Fischer Apr 17 '17 at 21:25
  • It is a bug in biblatex-chicago. With the bibtex backend it uses \cms@choose before it is defined. – Ulrike Fischer Apr 17 '17 at 22:04
  • @UlrikeFischer Thanks for the tip. How do I change my editor to biber? How does the typesetting change? I'm sorry if my questions are a bit too rudimentary for people here. I'll add that this was working until a few days ago. This suddenly popped up. – Sajjad Apr 18 '17 at 04:24
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    See https://tex.stackexchange.com/questions/154751/biblatex-with-biber-configuring-my-editor-to-avoid-undefined-citations – Ulrike Fischer Apr 18 '17 at 09:59
  • Actually the problem is not only that the command is not defined but that is also not expanded. In any case I wouldn't use bibtex backend with biblatex-chicago. – Ulrike Fischer Apr 18 '17 at 22:11
  • This problem has been resolved by using biber. Thanks a lot @UlrikeFischer. I think we can mark this conversation as resolved. No? – Sajjad Apr 19 '17 at 07:06
  • I added a short answer so that you can accept it and so remove the question from the unanswered list. – Ulrike Fischer Apr 19 '17 at 07:25

1 Answers1

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biblatex-chicago sets the sorting with 

 \ExecuteBibliographyOptions{...,sorting=\cms@choose,...}

With bibtex as backend the command \cms@choose ends up unexpanded in the control-file (a special bib created by biblatex) and then also in the bbl.

When the bbl is read at the begin of document LaTeX chokes on the @ in the command name and gives an error. The error could be avoided by activating \makeatletter but this wouldn't resolve the problem that bibtex didn't get the correct sorting name.

With the biber backend there is no problem.

As a conclusion I would avoid the bibtex backend with biblatex-chicago and switch to biber. A link how to do this is Biblatex with Biber: Configuring my editor to avoid undefined citations.

Ulrike Fischer
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