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8765
环境：texlive2019 + texstudio2.12.18
使用IEEEtran出现了错误 `undefined control sequence \maketitle`
```
\documentclass{IEEEtran}
\IEEEoverridecommandlockouts
\usepackage[dvips]{graphicx}
\usepackage{multirow}
\usepackage[left=0.71in,top=0.94in,right=0.71in,bottom=1.18in]{geometry}
\setlength{\columnsep}{0.24in}
\begin{document}
% paper title
\title{\huge Preparation of Papers in Two-Column Format}
% author names and affiliations
\author{\authorblockN{Karen Garfield and Mickey Mouse}
\authorblockA{\textit{Department of Nuclear Power Engineering}\\
\textit{University of Northland}\\
\textit{Iqaluit, Nunavut, M2M 6H6, Canada}\\
\textit{\{kgarfield, mmouse\}@unorthland.ca}\\}
}%
% make the title area
\maketitle
\begin{abstract}
Here is abstract contents.
\end{abstract}
\section{Introduction}
% no \PARstart
Here is introduction contents.
\end{document}
```
