Hi,
When I updated the system, the following .tex code does not work, it shows the error likes this:
(/usr/share/texlive/texmf-dist/tex/latex/chemformula/chemformula.sty
(/usr/share/texlive/texmf-dist/tex/latex/l3packages/xfrac/xfrac.sty
(/usr/share/texlive/texmf-dist/tex/latex/base/textcomp.sty)
(/usr/share/texlive/texmf-dist/tex/latex/l3packages/xtemplate/xtemplate.sty))
(/usr/share/texlive/texmf-dist/tex/latex/units/nicefrac.sty
(/usr/share/texlive/texmf-dist/tex/latex/base/ifthen.sty)))
! Undefined control sequence.
*l.24 \setdoublesep
{0.2 em} % 'Bond Spacing'*
\NeedsTeXFormat{LaTeX2e}[1997/12/01]
\documentclass[
journal=jacsat,
manuscript=article
]{achemso}
\usepackage[version=3]{mhchem}
\usepackage{wrapfig}
\usepackage{subfig}
\usepackage{graphicx}
\usepackage{threeparttable}
\usepackage{longtable,booktabs}
\usepackage[table, svgnames, dvipsnames]{xcolor}
\usepackage[first=0,last=9]{lcg}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{chemfig,chemmacros}
%\chemsetup[chemformula]{format=\sffamily}
\usepackage{chemformula}
\renewcommand*\printatom[1]{\ensuremath{\mathsf{#1}}}
\setdoublesep{0.2 em} % 'Bond Spacing'
\setatomsep{1.45 em} % 'Fixed Length'
\setbondoffset{0.1 em} % 'Margin Width'
\newcommand{\bondwidth}{0.08 em} % 'Line Width'
\setbondstyle{line width = \bondwidth}
\setcrambond{2pt}{}{}
\usetikzlibrary{decorations}
\pgfdeclaredecoration{ddbond}{initial}{
\state{initial}[width=4pt]{
\pgfpathlineto{\pgfpoint{4pt}{0pt}}
%\pgfpathmoveto{\pgfpoint{2pt}{2pt}}
\pgfpathmoveto{\pgfpoint{1pt}{2pt}}
\pgfpathlineto{\pgfpoint{2pt}{2pt}}
\pgfpathmoveto{\pgfpoint{3pt}{2pt}}
\pgfpathlineto{\pgfpoint{4pt}{2pt}}
\pgfpathmoveto{\pgfpoint{4pt}{0pt}}
}
\state{final}{
\pgfpathlineto{\pgfpointdecoratedpathlast}
}
}
\begin{document}
\end{document}