The code below works if I do not include \input{ChapterHeading.tex}, but I would like to include this if possible?
\documentclass{article}
\begin{document}
\input{title.tex}
\tableofcontents
\clearpage
\input{ChapterHeading.tex}
\chapter{(Chapter One)} \input{Introduction.tex}
\chapter{Chapter Two} \input{rv-NSS.tex}
\end{document}
and this is the ChapterHeading.tex file
\documentclass{book}
\usepackage{graphics}
\usepackage{titlesec}
\titleformat{\chapter}[display]
{\normalfont\Large\raggedleft}
{\MakeUppercase{\chaptertitlename}%
\rlap{ \resizebox{!}{1.5cm}{\thechapter} \rule{5cm}{1.5cm}}}
{10pt}{\Huge}
\titlespacing*{\chapter}{0pt}{30pt}{20pt}
\setcounter{chapter}{0}
\begin{document}
\pagenumbering{gobble}
\chapter{Introduction}
\end{document}
ChapterHeading.texfile. Instead of that you could build your title page manually using thetitlepageenvironment. – Aradnix Sep 19 '14 at 17:38