I'm having troubles with sections number...Each section continues the numeration of the precedent one, although a new chapter has started.
here is a MWE
\documentclass[12pt,a4paper]{report}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[italian]{babel}
\usepackage{remreset,siunitx,array,textgreek,booktabs,etoolbox,geometry}
\usepackage{graphicx,wrapfig,lscape,rotating,amsmath}
\geometry{letterpaper}
\sisetup{text-micro=\textmu}
\title{\Huge\textbf{Title}}
\author{di \textbf{Author}}
\date{date}
\makeatletter
\renewcommand \thesection {\@arabic\c@section}
\@removefromreset{section}{chapter}
\makeatother
\begin{document}
\maketitle
\chapter*{C1}
\section{S1.1}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\section{S1.2}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\chapter*{C2}
\section{S2.1}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\section{S2.2}
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
\chapter*{C3}
\section{S3.1}
blah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah
How can I solve this problem?

\@removefromreset{section}{chapter}– Sigur May 17 '14 at 18:50\chapter(the non-starred version) instead of\chapter*. – lockstep May 17 '14 at 18:50\chapter*command and your example is not complete.\end{document}is missing ;-) – May 17 '14 at 18:51