# [Tex/LaTex] Option clash for package [square]{natbib}

natbiboption-clash

If I call natbib, LaTeX runs with no problem. However, if I had the following

\usepackage[square, comma, numbers, sort&compress, super]{natbib}


it does not run and the following error appears:

Latex Error: Option clash for package natbib


The complete beginning of the document is:

\documentclass[preprint,showpacs,preprintnumbers,showkeys]{revtex4}

\newcommand{\classoption}[1]{\texttt{#1}}
\newcommand{\macro}[1]{\texttt{\textbackslash#1}}
\newcommand{\m}[1]{\macro{#1}}
\newcommand{\env}[1]{\texttt{#1}}

\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{epstopdf}
\usepackage{bm}
\usepackage{color}
\usepackage{natbib}
\usepackage[square,
comma,
numbers,
sort&compress,
super]{natbib}
\renewcommand{\thefootnote}{\fnsymbol{footnote}}
\usepackage{amssymb,amsmath,amsfonts}
\usepackage[hang,scriptsize,tight]{subfigure}

\begin{document}


Instead of (re)loading the natbib package with various options, simply execute
\usepackage{natbib}

By the way, the options numbers and super and mutually exclusive: choose one or the other, but not both.