I am trying to run my LaTeX file but it keeps coming up with the message above. All I tried to do was insert an equation and it all of a sudden happened. I haven't got the pdf open and my document starts like this:
\documentclass[12pt]{report}
\usepackage{a4,amsmath,amssymb,url}
\usepackage[active]{srcltx}
\usepackage{graphicx}
\usepackage{natbib}
\usepackage{mathrsfs}
\graphicspath{ {C:/Users/Edd/Documents/uni/uni maths/Year 3/investigatoin/} }
\usepackage[utf8]{inputenc}
\renewcommand{\thesection}{\arabic{section}}
\setlength{\parskip}{0.5cm}
\title{Computing and Computability}
\author{Edward J. Russell}
\begin{document}
\maketitle
\tableofcontents
and ends like this:
\bibliography{bibfile}
\bibliographystyle{plain}
\end{document}