# Strange behavior of page numbers in custom style

I'm writing a (kind of) book, with several chapters. Maybe it's not the right choice, but I'm using the subfile package to create a main.tex file and a "custom style" using the mystyle package. I've trouble with the page number behavior. What I want is: TOC and introduction sections without any header nor page numbers, all the other chapters with "normal" page numbers. Here are my files:

main.tex:

\documentclass[12pt, openright, twoside, a4paper]{report}
\usepackage{subfiles}
\usepackage{mystyle} %/Users/.../texmf/tex/latex/misc/mystyle.sty
\setcounter{tocdepth}{3}

\begin{document}
\subfile{./titre}
\tableofcontents
\subfile{./Introduction}
\subfile{./Ch1}
\subfile{./Ch2}
\subfile{./Ch3}
... other chapters
\clearpage
\end{document}


mystyle.sty:

\ProvidesPackage{mystyle}
\usepackage[margin=3.5cm]{geometry}
... some stuffs
\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{\thechapter. \ #1}{}}
\renewcommand{\sectionmark}[1]{\markright{\thesection. \ #1}{}}
\fancyhf{}
\fancyfoot[RO,LE]{\thepage}
\renewcommand{\headrulewidth}{0.5pt}% filet en haut de page
\renewcommand{\footrulewidth}{0.5pt}  % filet en bas
...other stuffs
\endinput


and the introduction file:

\documentclass[./main.tex]{subfiles}
\begin{document}
\pagenumbering{gobble} % Remove page numbers (and reset to 1) (http://tex.stackexchange.com/questions/54333/no-page-numbering)
%\clearpage
\thispagestyle{empty}
\chapter*{Introduction} % Major section
... some text
\end{document}


And it doesn't work. Well, page headers and decorations are just fine, but page numbers appear nowhere! I really don't understand what happens here. I though that for each "call" of a ChX file, the style mystyle file was re-read. Is it the case? Any ideas? Thanks!

• What happens if you remove the \pagenumbering{gobble} % Remove page numbers (and reset to 1)? Mar 6 '17 at 18:47
• Please don't write ...some stuffs in the package code ... it is not compilable and requires us to remove it
– user31729
Mar 6 '17 at 18:49
• @Ulrike Fisher If I do that, page number appear everywhere Mar 6 '17 at 19:02
• @ Christian Hupfer Sorry... I'll remember for the next time Mar 6 '17 at 19:03
• So you know now why they disappear. Try out \pagenumbering{arabic} at the point where they should appear (this will reset the number to 1, if you don't want this, you should redefine only \thepage, or define a special page style). Mar 6 '17 at 19:12