# Comment package does not work in beamer

I want to use the comment package in my presentation. I read that it does not always work in some very complicated contexts, but here it fails even in a very simple example:

\documentclass{beamer}
\usepackage{comment}
\begin{document}
\begin{frame}
random text

\begin{comment}
hidden text
\end{comment}

\end{frame}
\end{document}


I can't find a solution for this problem in this site. Is there an incompatibility or am I missing something?

• That was it. Anyway, where is it documented? I searched both the docs and found nothing... – Jason T. Jan 4 '14 at 12:30
• @dcmst you should convert your comment to an answer then – masu Jan 4 '14 at 14:22

## 1 Answer

The comment environment works by interpreting the content of the environment as verbatim text which is then discarded.

For this reason in beamer it needs to be loaded inside a fragile frame, like other verbatim text:

\documentclass{beamer}
\usepackage{comment}
\begin{document}
\begin{frame}[fragile]     % fragile option
random text

\begin{comment}
hidden text
\end{comment}

\end{frame}
\end{document}


This is not documented directly but is implied by the inner workings of the comment package, explained in the documentation.