La génération automatique d'affiche a rencontré un problème:
This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
 %&-line parsing enabled.
entering extended mode
(/tmp/poster.tex
LaTeX2e <2005/12/01>
Babel  and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, arabic, basque, bulgarian, coptic, welsh, czech, slovak, german, ng
erman, danish, esperanto, spanish, catalan, galician, estonian, farsi, finnish,
 french, greek, monogreek, ancientgreek, croatian, hungarian, interlingua, ibyc
us, indonesian, icelandic, italian, latin, mongolian, dutch, norsk, polish, por
tuguese, 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/size11.clo))
(/usr/share/texmf/tex/latex/base/inputenc.sty
(/usr/share/texmf/tex/latex/base/latin1.def))
(/usr/share/texmf/tex/generic/babel/babel.sty
(/usr/share/texmf/tex/generic/babel/frenchb.ldf
(/usr/share/texmf/tex/generic/babel/babel.def)
*************************************
* Local config file frenchb.cfg used
*
(/usr/share/texmf/tex/generic/babel/frenchb.cfg))) (./poster.aux)
(/usr/share/texmf/tex/latex/lm/t1lmr.fd)
Underfull \hbox (badness 10000) in paragraph at lines 43--45


Underfull \hbox (badness 10000) in paragraph at lines 49--50


LaTeX Warning: Command \' invalid in math mode on input line 51.

! Please use \mathaccent for accents in math mode.
\add@accent ...@spacefactor \spacefactor }\accent 
                                                  #1 #2\egroup \spacefactor ...
l.51 ...N, IPN, Bâtiment 100, salle A015( $$ )\\Sé
                                                  minaire du groupe de physi...

? 
! Emergency stop.
\add@accent ...@spacefactor \spacefactor }\accent 
                                                  #1 #2\egroup \spacefactor ...
l.51 ...N, IPN, Bâtiment 100, salle A015( $$ )\\Sé
                                                  minaire du groupe de physi...

No pages of output.
Transcript written on poster.log.

Si vous en avez la possibilité, merci de bien vouloir corriger les informations erronées.