Allora, in ordine:
`% book example for classicthesis.sty
\documentclass[10pt,a4paper,footinclude=true,headinclude=true]{scrreprt}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[french,latin,italian]{babel}
\usepackage{microtype}
\usepackage{lipsum}
%\usepackage{classicthesis-preamble}
\usepackage[eulerchapternumbers,parts,pdfspacing]{classicthesis}
%\usepackage{arsclassica}
\begin{document}
\tableofcontents
% use \cleardoublepage here to avoid problems with pdfbookmark
\cleardoublepage\part{Test Part}
\chapter{Test Chapter}
\lipsum[1]
\section{A Section}
\lipsum[1]
\chapter{Test Chapter}
\lipsum[1]
\section{A Section}
\lipsum[1]
\appendix
\cleardoublepage\part{Appendix}
\chapter{Appendix Chapter}
\lipsum[1]
\section{A Section}
\lipsum[1]
\end{document}`
Bene o male funge e compila, ma se decommento \usepackage{classicthesis-preamble} ottengo questo errore:
`! LaTeX Error: Option clash for package classicthesis.
See the LaTeX manual or LaTeX Companion for explanation.
Type H
…
l.13
?`
mentre se decommento \usepackage{arsclassica} ottengo quest’altro errore:
`! Undefined control sequence.
l.157 \captionsetup
{format=hang,font=small,labelfont={sf,bf}}
?`