Undefined Control Sequence when using editor field with bibtex

Hello!

My problem is the following:

When I use this latex-file:

\documentclass[12pt,ngerman]{report}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage{geometry}
\geometry{verbose,letterpaper,tmargin=2cm,bmargin= 2cm,lmargin=2cm,rmargin=2cm}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}

\makeatletter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands.


\usepackage[ngerman]{babel}
\makeatother

\begin{document}
\selectlanguage{ngerman}

\cite{jockel}
lksdfj

\bibliographystyle{gerplain}
\bibliography{example}

\end{document}


with this bibTex-File:
@BOOK{Jockel,
title = {Some Titel},
publisher = {aslkfjd},
year = {2000},
author = {Jockel},
edition = {2},
owner = {Joerg},
timestamp = {2008.07.31}
}

and do
latex ...
bibtex ...
latex ...
then here I get the following message and latex want´s me to type something
to the console:

LaTeX Warning: Citation `jockel' on page 1 undefined on input line 21.

(./FehlerBabel.bbl [1]
! Undefined control sequence.
l.5 \newblock aslkfjd, 1 \btxeditionlong
{}, 2000.
?

When I remove the edition-tag from the book-tag I do not get this fault.
Also the fault only comes when I use some german bibtex-style like
germalpha or germplain ...

So, does anyone know what´s going on here?

Thank you for your help in advance.

Ich sehe gerade, ich hätte auch auf Deutsch schreiben können. :confused:

Jörg

Hi,

Try to write \cite{Jockel} instead of \cite{jockel}

;)

Weißt ja was ich meine

Gruß
Wildy

Hallo Jörg,

Code:

---

\usepackage{bibgerm}

---

behebt das, darin ist \btxeditionlong definiert.

Viele Grüße,

Stefan

Looks like the issue might be related to how special characters are handled. BibTeX can sometimes misinterpret certain sequences, leading to errors. Also, if you’re exploring different ways to structure your bibliography, you might find it interesting how formatting principles apply in other fields—like in this guide on how to grow mushrooms at home https://fungiape.com/how-to-grow-mushrooms-at-home/ Small details matter, whether it's citation syntax or creating the right conditions for growth. Maybe also check your `.bst` file to ensure it's not expecting a different field format.