title: apsrev4-1 error: ! File ended while scanning use of \@secondoftwo
body: <p>I try to use apsrev4-1.bst as bibliographystyle to manage format of my prl (physical review letters) paper. However, I got a error I don't understand. Actually, my code works well if using prl.bst, but report error: "! File ended while scanning use of \@secondoftwo." (the reason I want to use apsrev4-1.bst instead of prl.bst is because prl.bst will show title in reference which I don't know why either). I haven't played with latex for very long time, and this is the first time I deal with bibtex of PRL paper. Can somebody give me a hint how can I solve this problem? </p>
  
  <pre><code>\NeedsTeXFormat{LaTeX2e}
  \documentclass[aps,prl,showpacs, superscriptaddress, lengthcheck]{revtex4-1}
  %\usepackage{hyperref}
  \usepackage{latexsym}
  \usepackage{amssymb}
  \usepackage{graphicx}
  \usepackage{color}
  \usepackage{natbib}
  \bibliographystyle{apsrev4-1}
  
  
  
  \begin{document}
  
  
  \bibliography{KZ_PRL_v8}
  
  \end{document}
  </code></pre>