# Nomenclature package error : Lonely \item--perhaps a missing list environment [closed]

I am using the package nomencl to generate a list of abbreviations. However, after a recent MiKTeX 2.9 update (using TeXnicCenter) I keep getting errors for the abbreviation items

LaTeX Error: Lonely \item--perhaps a missing list environment.


Unfortunately, I cannot figure out an MWE (the MWE that I tried do work, but the real document doesn't). So here is a shortened version of my main document (without all the other header stuff and bibliography):

\documentclass{scrartcl}
\usepackage[intoc]{nomencl}
\let\abk\nomenclature
\renewcommand{\nomname}{List of Abbreviations}
\let\OrgItem\item
\hspace{\labelsep}}}
\setlength{\nomitemsep}{-\parsep}
\makenomenclature

\begin{document}
\printnomenclature \newpage
\include{Introduction}
\include{Methods}
\include{Results}
\end{document}


However, if instead of including the chapters I simply try out an MWE with the same header and one abbreviation:

\begin{document}
\printnomenclature \newpage
This is my txt \abk{txt}{text}
\end{document}


then everything works fine. Any suggestions about the reason?

-
Try to successively remove parts of the main document until the error disappears. – gerrit Dec 6 '11 at 14:45
Try \input instead of \include. – Count Zero Dec 6 '11 at 15:14
@gerrit: Due to the kind of the error message I thought it is a general problem rather than text-dependent. I followed your advice and after 2 hours trying to narrow down the problem area I finally found the reason: One of the abbreviations was defined twice. – Anja Dec 6 '11 at 17:29