Errors using \acrodef or \newacro

Question

Using the package acronym, I get a error defining acronyms with \acrodef or \newacro instead of \acro:

! LaTeX Error: Something's wrong--perhaps a missing \item.
See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                        
l.11 \end{acronym}
?

It is possible to ignore this error, but I need a compiling file for submission at a conference.

This is an example, triggering that error:

\documentclass{scrartcl}
\usepackage[printonlyused]{acronym}
\begin{document}
This is an example; \ac{IHE}.\\
And \ac{IHE} again!

\begin{acronym}[IHE]
\acrodef{IHE}{\emph{Integrating the Health Enterprise}}
\end{acronym}
\end{document}

Answer 1

According to section 2.3 of the acronym manual, \acrodef should be used "[i]f one does not want an acronym list to be produced at all" (p. 4). Inside an acronym environment simply use the \acro command.

\documentclass{scrartcl}
\usepackage[printonlyused]{acronym}
\begin{document}
This is an example; \ac{IHE}.\\
And \ac{IHE} again!

\begin{acronym}[IHE]
\acro{IHE}{\emph{Integrating the Health Enterprise}}
\end{acronym}
\end{document}

\acrodef works outside the acronym environment:

\documentclass{scrartcl}
\usepackage[printonlyused]{acronym}
\acrodef{IHE}{\emph{Integrating the Health Enterprise}}
\begin{document}
This is an example; \ac{IHE}.\\
And \ac{IHE} again!
\end{document}