Message d'erreur incompréhensible

[un bon petit]

le problème persiste

Ce code compile sans aucune erreur et donne une sortie pdf (texlive2020 à jour).

[pianiste06]

Oui, mais pas sur mon ordi et sur Miktex.

Bon, je laisse tomber le package mhchem, c'est plus simple pour tout le monde... à commencer par moi.

Merci encore pour votre aide.

[gigiair]

Il faudrait comparer les versions des packages utilisés : compiler l'ECM modifié en ajoutant la commande \listfiles

Code : Tout sélectionner

\documentclass{standalone}
\usepackage{chemist}
\usepackage{bm}
\usepackage{mhchem}
\usepackage{chemfig}
\usepackage{chemmacros}
\listfiles{}
\begin{document}
\ch{SO_4^{2-}}\qquad\ce{SO^{2-}_4}\qquad\ce{SO^2-_4}
\end{document}

Puis dans le fichier log repérer le listing des versions à la suite de *File List*
Voici ce que me renvoie la compilation chez moi (TeXLive 2020) :

Code : Tout sélectionner

 *File List*
standalone.cls    2018/03/26 v1.3a Class to compile TeX sub-files standalone
shellesc.sty    2019/11/08 v1.0c unified shell escape interface for LaTeX
ifluatex.sty    2019/10/25 v1.5 ifluatex legacy package. Use iftex instead.
   iftex.sty    2020/03/06 v1.0d TeX engine tests
 xkeyval.sty    2014/12/03 v2.7a package option processing (HA)
 xkeyval.tex    2014/12/03 v2.7a key=value parser (HA)
standalone.cfg    2018/03/26 v1.3a Default configuration file for 'standalone' class
 article.cls    2019/12/20 v1.4l Standard LaTeX document class
  size10.clo    2019/12/20 v1.4l Standard LaTeX file (size option)
 chemist.sty    
assurechemist.sty    
      bm.sty    2019/07/24 v1.2d Bold Symbol Support (DPC/FMi)
  mhchem.sty    2018/06/22 v4.08 for typesetting chemical formulae
   expl3.sty    2020-04-06 L3 programming layer (loader) 
l3backend-pdfmode.def    2020-03-12 L3 backend support: PDF mode
l3keys2e.sty    2020-03-06 LaTeX2e option processing using LaTeX3 keys
    calc.sty    2017/05/25 v4.3 Infix arithmetic (KKT,FJ)
 amsmath.sty    2020/01/20 v2.17e AMS math features
 amstext.sty    2000/06/29 v2.01 AMS text
  amsgen.sty    1999/11/30 v2.0 generic functions
  amsbsy.sty    1999/11/29 v1.2d Bold Symbols
  amsopn.sty    2016/03/08 v2.02 operator names
chemgreek.sty    2020/01/16 v1.1a interface for upright Greek letters for use in chemistry (CN)
  xparse.sty    2020-03-06 L3 Experimental document command parser
graphics.sty    2019/11/30 v1.4a Standard LaTeX Graphics (DPC,SPQR)
    trig.sty    2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg    2016/06/04 v1.11 sample graphics configuration
  pdftex.def    2018/01/08 v1.0l Graphics/color driver for pdftex
 chemfig.sty    2020/04/14 v1.52 Draw molecule with an easy syntax (CT)
    tikz.sty    2020/01/08 v3.1.5b (3.1.5b)
     pgf.sty    2020/01/08 v3.1.5b (3.1.5b)
  pgfrcs.sty    2020/01/08 v3.1.5b (3.1.5b)
everyshi.sty    2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
 pgfcore.sty    2020/01/08 v3.1.5b (3.1.5b)
graphicx.sty    2019/11/30 v1.2a Enhanced LaTeX Graphics (DPC,SPQR)
  pgfsys.sty    2020/01/08 v3.1.5b (3.1.5b)
pgfsys.code.tex
pgfsyssoftpath.code.tex    2020/01/08 v3.1.5b (3.1.5b)
pgfsysprotocol.code.tex    2020/01/08 v3.1.5b (3.1.5b)
  xcolor.sty    2016/05/11 v2.12 LaTeX color extensions (UK)
   color.cfg    2016/01/02 v1.6 sample color configuration
pgfcore.code.tex
pgfcomp-version-0-65.sty    2020/01/08 v3.1.5b (3.1.5b)
pgfcomp-version-1-18.sty    2020/01/08 v3.1.5b (3.1.5b)
  pgffor.sty    2020/01/08 v3.1.5b (3.1.5b)
 pgfkeys.sty    
pgfkeys.code.tex
 pgfmath.sty    
pgfmath.code.tex
pgffor.code.tex
tikz.code.tex
chemmacros.sty    2020/03/07 v5.11 comprehensive support for typesetting chemistry documents (CN)
chemmacros5.sty    2020/03/07 v5.11 comprehensive support for typesetting chemistry documents (CN)
chemmacros.module.base.code.tex    2020/03/07 v5.11 chemmacros module `base' 2020/02/02 basic chemmacros module
etoolbox.sty    2019/09/21 v2.5h e-TeX tools for LaTeX (JAW)
scrlfile.sty    2020/01/24 v3.29 KOMA-Script package (loading files)
chemmacros.module.errorcheck.code.tex    2020/03/07 v5.11 chemmacros module `errorcheck' 2016/10/05 error checking for unloaded modules
chemmacros.module.lang.code.tex    2020/03/07 v5.11 chemmacros module `lang' 2016/05/31 language settings for chemmacros
translations.sty    2018/02/28 v1.8 internationalization of LaTeX2e packages (CN)
pdftexcmds.sty    2019/11/24 v0.31 Utility functions of pdfTeX for LuaTeX (HO)
infwarerr.sty    2019/12/03 v1.5 Providing info/warning/error messages (HO)
 ltxcmds.sty    2019/12/15 v1.24 LaTeX kernel commands for general use (HO)
chemmacros.module.greek.code.tex    2020/03/07 v5.11 chemmacros module `greek' 2020/02/02 upright greek symbols
chemmacros.module.chemformula.code.tex    2020/03/07 v5.11 chemmacros module `chemformula' 2020/02/02 integration of chemical formulas
chemmacros.module.charges.code.tex    2020/03/07 v5.11 chemmacros module `charges' 2015/07/30 charges
chemmacros.module.acid-base.code.tex    2020/03/07 v5.11 chemmacros module `acid-base' 2018/02/22 acid/base
chemmacros.module.symbols.code.tex    2020/03/07 v5.11 chemmacros module `symbols' 2015/06/09 symbols
chemmacros.module.particles.code.tex    2020/03/07 v5.11 chemmacros module `particles' 2016/04/02 particles
chemmacros.module.phases.code.tex    2020/03/07 v5.11 chemmacros module `phases' 2016/05/31 phase descriptors
chemmacros.module.nomenclature.code.tex    2020/03/07 v5.11 chemmacros module `nomenclature' 2017/06/11 chemical names
chemmacros.module.tikz.code.tex    2020/03/07 v5.11 chemmacros module `tikz' 2015/10/26 upright greek symbols
chemformula.sty    2020/03/07 v4.15j typeset chemical compounds and reactions (CN)
   xfrac.sty    2020-03-06 L3 Experimental split-level fractions
textcomp.sty    2020/02/02 v2.0n Standard LaTeX package
xtemplate.sty    2020-03-06 L3 Experimental prototype document functions
nicefrac.sty    1998/08/04 v0.9b Nice fractions
  ifthen.sty    2014/09/29 v1.1c Standard LaTeX ifthen package (DPC)
supp-pdf.mkii
epstopdf-base.sty    2020-01-24 v2.11 Base part for package epstopdf
epstopdf-sys.cfg    2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
translations-basic-dictionary-english.trsl    (english translation file `translations-basic-dictionary')
 ***********
 

Il y en a beaucoup, ce n'est pas une très bonne idée d'employer la classe standalone ...
Comparer avec ce que produit la compilation chez toi.