词汇表的垂直对齐，\setlist[description]: ! 缺少数字，视为零

Question

我想垂直对齐此链接后面的缩写列表词汇表：首字母缩略词的长名称垂直对齐我喜欢答案“描述列表方法”的第二种方法，所以我尝试了以下示例：

\documentclass{article}

\usepackage{enumitem}
\usepackage[xindy={glsnumbers=false}, acronym, nogroupskip, nonumberlist, nopostdot]{glossaries}

\makeglossaries

\newacronym{ny}{NY}{New York}
\newacronym{cpu}{CPU}{Central Processing Unit}
\newacronym{jpeg}{JPEG}{Joint Photographic Experts Group}

\begin{document}

\glsaddall

\setlist[description]{leftmargin=!, labelwidth=3em}
\printacronyms
\setlist[description]{style=standard}

\end{document}

但是我收到一条错误消息，指出命令 \setlist[description] 存在错误：

#:latex latexT.tex
This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
 %&-line parsing enabled.
entering extended mode
(./latexT.tex
LaTeX2e <2005/12/01>
Babel <v3.8h> and hyphenation patterns for english, usenglishmax, dumylang, nohyphenation, arabic, basque, bulgarian, coptic, welsh, czech, slovak, german, ngerman, danish, esperanto, spanish, catalan, galician, estonian, farsi, finnish, french, greek, monogreek, ancientgreek, croatian, hungarian, interlingua, ibycus, indonesian, icelandic, italian, latin, mongolian, dutch, norsk, polish, portuguese, pinyin, romanian, russian, slovenian, uppersorbian, serbian, swedish, turkish, ukenglish, ukrainian, loaded.
(/usr/share/texmf/tex/latex/base/article.cls
Document Class: article 2005/09/16 v1.4f Standard LaTeX document class
(/usr/share/texmf/tex/latex/base/size10.clo))
(/usr/share/texmf/tex/latex/enumitem/enumitem.sty
(/usr/share/texmf/tex/latex/graphics/keyval.sty)) (./glossaries.sty
(/usr/share/texmf/tex/latex/base/ifthen.sty)
(/usr/share/texmf/tex/latex/xkeyval/xkeyval.sty
(/usr/share/texmf/tex/latex/xkeyval/xkeyval.tex)) (./mfirstuc.sty
(./etoolbox.sty (/usr/share/texmf/tex/latex/etex/etex.sty)))
(/usr/share/texmf/tex/latex/textcase/textcase.sty) (./xfor.sty)
(./datatool-base.sty (/usr/share/texmf/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/usr/share/texmf/tex/latex/amsmath/amstext.sty
(/usr/share/texmf/tex/latex/amsmath/amsgen.sty))
(/usr/share/texmf/tex/latex/amsmath/amsbsy.sty)
(/usr/share/texmf/tex/latex/amsmath/amsopn.sty))
(/usr/share/texmf/tex/latex/substr/substr.sty)

LaTeX Warning: You have requested, on input line 48, version
               `2009/10/20' of package substr,
               but only version
               `2005/11/29 v1.1 Handle substrings'
               is available.

(./datatool-fp.sty (/usr/share/texmf/tex/latex/fp/fp.sty
`Fixed Point Package', Version 0.8, April 2, 1995 (C) Michael Mehlich
(/usr/share/texmf/tex/latex/fp/defpattern.sty)
(/usr/share/texmf/tex/latex/fp/fp-basic.sty)
(/usr/share/texmf/tex/latex/fp/fp-addons.sty)
(/usr/share/texmf/tex/latex/fp/fp-snap.sty)
(/usr/share/texmf/tex/latex/fp/fp-exp.sty)
(/usr/share/texmf/tex/latex/fp/fp-trigo.sty)
(/usr/share/texmf/tex/latex/fp/fp-pas.sty)
(/usr/share/texmf/tex/latex/fp/fp-random.sty)
(/usr/share/texmf/tex/latex/fp/fp-eqn.sty)
(/usr/share/texmf/tex/latex/fp/fp-upn.sty)
(/usr/share/texmf/tex/latex/fp/fp-eval.sty)))) (./glossaries-compatible-307.sty) (./glossary-hypernav.sty) (./glossary-list.sty) (./glossary-long.sty (/usr/share/texmf/tex/latex/tools/longtable.sty)) (./glossary-super.sty (/usr/share/texmf/tex/latex/supertabular/supertabular.sty)) (./glossary-tree.sty)) (./latexT.aux) (./latexT.glsdefs)
! Missing number, treated as zero.
<to be read again> 
                   d
l.16 \setlist[description]
                          {leftmargin=!, labelwidth=3em}
?

有人知道哪里出了问题以及如何解决吗？

谢谢