! Missing $ inserted

Question

im experiencing a kind of weird error. I receive the "! Missing $ inserted." error message for line 727. The problem: the line is empty! In the error message he seems to load an R document that I tried to include before. However, I have deleted this line of code as I have spaces in the folder paths. Now, I can work with my file at all. Can you please help? My last save is 24h old... When i open the file with TexMaker I always receive a "File not found" error message.

Even if I shorten the document to have <727 lines, I still get an error for line 727

\documentclass[12pt,a4paper,oldfontcommands,oneside]{memoir}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{microtype}
\usepackage[dvips]{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{xcolor}
\usepackage{times}
\usepackage{amsmath}
\usepackage{blindtext}  
\usepackage{fancyhdr}   
\usepackage{etoolbox}
\usepackage{eurosym}    
\usepackage[printonlyused]{acronym} 
\usepackage{booktabs}   
\usepackage[bottom]{footmisc}
\setlength{\footnotemargin}{0.0cm}


\usepackage[breaklinks=true,colorlinks=true,linkcolor=black,urlcolor=black,citecolor=black,
bookmarks=true,bookmarksopenlevel=2]{hyperref}

\usepackage[nosectionbib]{apacite}

\usepackage{epstopdf}

\usepackage{geometry}
%%% PRINTING OPTIONS
\geometry{total={210mm,297mm},
left=33mm,right=33mm,
bindingoffset=0mm, top=25mm,bottom=20mm}

\OnehalfSpacing

%%% CHAPTER'S STYLE
\chapterstyle{article}
%%% STYLE OF SECTIONS, SUBSECTIONS, AND SUBSUBSECTIONS
\setsecheadstyle{\Large\bfseries\sffamily\raggedright}
\setsubsecheadstyle{\large\bfseries\sffamily\raggedright}
\setsubsubsecheadstyle{\bfseries\sffamily\raggedright}


%%% STYLE OF PAGES NUMBERING USING THE FANCYHDR PACKAGE
\pagestyle{fancy}
\fancyhf{}
\lhead{\leftmark}   %%% Show Chapter left in Header
%\lhead{\leftmark}  %%% Show Section left in Header
\cfoot{\thepage}

\maxsecnumdepth{subsection} % chapters, sections, and subsections are numbered
\maxtocdepth{subsection} % chapters, sections, and subsections are in the Table of Contents


%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%

\begin{document}


\end{tabular}

\clearpage

\chapter{Results}

\section{Placeholder}




\appendix
\chapter{The Internal Ratings-Based Approach of the Basel II Concept}
\[Capital = \left\{45\times N \left[\frac{IN(PD)}{\sqrt{1-R}} + \frac{\sqrt{R} \times IN(0.999)}{\sqrt{1-R}}\right] - 45 \times PD \right\} \times \left[\frac{1+(M-2.5) \times b(PD)}{1-1.5 \times b(PD}\right]\]

\chapter{Second Appendix}


\clearpage
%\markboth{BIBLIOGRAPHY}{}  %%% BIBLIOGRAPHY in Header
\bibliographystyle{apacite}
\bibliography{References}
\clearpage

\end{document}





! Missing $ inserted.
<inserted text> 
                $
l.727 ...is/R/Down-and-in Call/down-and-in_call.R}

I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.


! Package Listings Error: File `C:/Users/User/Documents/Master Thesis/R/Down-an
d-in Call/down-and-in_call(.R)' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: R)

Enter file name: 
! Emergency stop.
<read *> 

l.727 ...is/R/Down-and-in Call/down-and-in_call.R}


*** (cannot \read from terminal in nonstop modes)

Answer 1

I managed to reduce your example to the minimum working one. To avoid messing with the filecontents routine, try this most minimal example. Create an R file, name it my.R and add this line only (if dollar signs and underscores are the suspects, why not try them?):

data$var <- a_1

Then, try this LaTeX document:

\documentclass{memoir}
\usepackage[utf8]{inputenc}
\usepackage{listings}

\begin{document}
\lstinputlisting[language=R]{my.R}
\end{document}

You should get something like this:

Fine? Try to copy half of your down-and-in_call.R into my.R and compile it. It works? Good. Does not work? Continue bisecting till you find the problematic line (listings does not handle UTF-8 well, for example). Good? Add the packages from your preamble.

And in case of any trouble, do not forget to do the cleanup of helper files. Does this work for you?