J'ai un soucis souci de compilation de la page de titre de mon livre. C'est la commande `\maketitle` qui ne fonctionne pas et qui me retourne l'erreur suivante : Package etoolbox Error: Boolean '\ifYAD@maketitle@used' undefined. \maketitle Voici le code: \documentclass[a5paper,12pt]{book} \usepackage[francais]{babel} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{kpfonts} \usepackage{booktabs} \usepackage{pdfpages} \usepackage{siunitx} \usepackage{pgfplots} \usepackage{floatrow} \usepackage{caption} \usepackage{graphicx} \usepackage{listings} \usepackage{microtype} \usepackage{varioref} \usepackage{multirow} \usepackage{array} \usepackage{xcolor} \usepackage[xindy,quiet]{imakeidx} \usepackage[autostyle]{csquotes} \usepackage[backend=biber,sorting=none,style=numeric-comp]{biblatex} \usepackage{hyperref} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{kpfonts} \usepackage{booktabs} \usepackage{siunitx} \usepackage{pgfplots} \usepackage{floatrow} \usepackage{caption} \usepackage{graphicx} \usepackage{listings} \usepackage{microtype} \usepackage{varioref} \usepackage{array} \usepackage{xcolor} \usepackage[xindy,quiet]{imakeidx} \usepackage[autostyle]{csquotes} \usepackage{setspace} \onehalfspacing \makeatletter \renewcommand{\maketitle}{% \booltrue{YAD@maketitle@used} \vspace{5cm} \centering \Large{blabla}\par \vspace{1cm} \centering {XX} \par \vspace{1cm} \centering \endgroup% \restoregeometry% } \makeatother \usepackage[a5paper]{geometry} \begin{document} \frontmatter \maketitle \thispagestyle{empty} \mainmatter \chapter{Préface} \end{document}

J'ai un soucis de compilation de la page de titre de mon livre. C'est la commande `\maketitle` qui ne fonctionne pas et qui me retourne l'erreur suivante : Package etoolbox Error: Boolean '\ifYAD@maketitle@used' undefined. \maketitle Voici le code: \documentclass[a5paper,12pt]{book} \usepackage[francais]{babel} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{kpfonts} \usepackage{booktabs} \usepackage{pdfpages} \usepackage{siunitx} \usepackage{pgfplots} \usepackage{floatrow} \usepackage{caption} \usepackage{graphicx} \usepackage{listings} \usepackage{microtype} \usepackage{varioref} \usepackage{multirow} \usepackage{array} \usepackage{xcolor} \usepackage[xindy,quiet]{imakeidx} \usepackage[autostyle]{csquotes} \usepackage[backend=biber,sorting=none,style=numeric-comp]{biblatex} \usepackage{hyperref} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{kpfonts} \usepackage{booktabs} \usepackage{siunitx} \usepackage{pgfplots} \usepackage{floatrow} \usepackage{caption} \usepackage{graphicx} \usepackage{listings} \usepackage{microtype} \usepackage{varioref} \usepackage{array} \usepackage{xcolor} \usepackage[xindy,quiet]{imakeidx} \usepackage[autostyle]{csquotes} \usepackage{setspace} \onehalfspacing \makeatletter \renewcommand{\maketitle}{% \booltrue{YAD@maketitle@used} \vspace{5cm} \centering \Large{blabla}\par \vspace{1cm} \centering {XX} \par \vspace{1cm} \centering \endgroup% \restoregeometry% } \makeatother \usepackage[a5paper]{geometry} \begin{document} \frontmatter \maketitle \thispagestyle{empty} \mainmatter \chapter{Préface} \end{document}