When using the comment package, one can get a very strange error
Runaway argument?
! File ended while scanning use of \next.
when compiling a file that excludes some comments
\documentclass{scrartcl}
\usepackage{comment}
\excludecomment{enonce}
\begin{document}
\begin{enonce}
some text
\end{enonce}
\end{document}
