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up vote 4 down vote favorite

I have a problem with LaTeX...

I'm writing simple text in a \section{Goals}, with no math forumulas, no code, ogni text...

This is my LaTeX code:

\section{Goals}
\labelsec{Goals}
Abbiamo già accennato nell'introduzione che uno degli 
obiettivi di questo elaborato è quello di focalizzarsi 
sullo sviluppo del software Model Driven a partire dalla 
primissima fase, di verifica dei requisiti, così da..

And when I do quick compile, LaTeX gave me

Missing $ error.

But, if I have only

\section{Goals}
\labelsec{Goals}
Abbiamo già accennato nell'introduzione che uno degli 
obiettivi di questo elaborato è quello di focalizzarsi 
sullo sviluppo del software Model Driven a partire dalla 
primissima fase, di verifica dei requisiti

I don't have the error. Why? I don't understand why , così da gives me the error!

This is the entire code of the latex document:

\documentclass{llncs}

\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{url}
\usepackage{xspace}

\makeatletter
\usepackage{manifest}

\makeatother

\begin{document}

\title{Esame finale A.A. 2016/2017\\
 Ingegneria dei Sistemi Software}

\maketitle

    \section{Goals}
    \labelsec{Goals}
    Abbiamo già accennato nell'introduzione che uno degli 
obiettivi di questo elaborato è quello di focalizzarsi 
sullo sviluppo del software Model Driven a partire dalla
primissima fase, di verifica dei requisiti così da

    \end{document}
share|improve this question
    
I cannot reproduce. This works without a problem. – Henri Menke 6 hours ago
2  
Please add a complete MWE from \documentclass to \end{document} in order to be able to help you. – Jan 6 hours ago
1  
Welcome to TeX.SX! Please help us help you and add a minimal working example (MWE) that illustrates your problem. Reproducing the problem and finding out what the issue is will be much easier when we see compilable code, starting with \documentclass{...} and ending with \end{document}. – Martin Schröder 5 hours ago
1  
Please wait at least 24 hours after asking the OP for improvements to the question before voting to close. Also, if you downvote, please don't forget to revert the vote after the question is improved. – Martin Schröder 5 hours ago
    
@HenriMenke it really isn't hard to reproduce given the code in the question, see my answer. – David Carlisle 4 hours ago
up vote 10 down vote accepted

You have not provided a full example but I would guess that you have

\documentclass[12pt, a4paper]{article}
\usepackage[latin1]{inputenc}

\begin{document}
\section{Goals}
\label{Goals}
Abbiamo già accennato nell'introduzione che uno degli 
obiettivi di questo elaborato è quello di focalizzarsi 
sullo sviluppo del software Model Driven a partire dalla 
primissima fase, di verifica dei requisiti, così da..
\end{document}

which produces the error

! Missing $ inserted.
<inserted text> 
                $
l.10 ...ima fase, di verifica dei requisiti, così
                                                   da..
?

The reason is that the encoding has been incorrectly specified as latin1 when your file is in UTF-8 If you declare [utf8] then

enter image description here

Why a math error? Well in UTf-8 non ascii characters take multiple bytes and ì takes 2, the bytes hex C3 AC . In latin1 encoding that you specified, each character takes a single byte so C3 AC is seen as two characters.

C3 is \~A

and

AC is \lnot which is a math operator seen here in text mode so generates the error.

share|improve this answer
    
I changed my usepackage from \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} to \usepackage[T1]{fontenc} \usepackage[italian]{babel} \usepackage[utf8]{inputenc} and now it works! Thank you so much. – JEricaM 4 hours ago
up vote 2 down vote

This answer is a bit of guess, as you didn't post a MWE (Minimal Working Example).

I guess, that you missed to define the encoding used in your input file. I therefore added \usepackage[utf8]{inputenc} or in my case luainputenc.

At least, this MWE is working for me.

But as there is so much guess (e.g. I also removed the \labelsec-command, as I don't know, where it comes from. Maybe this is the root of your problem? Who knows.

\documentclass[12pt, a4paper]{article}
\usepackage[utf8]{luainputenc}

\begin{document}
\section{Goals}
\label{Goals}
Abbiamo già accennato nell'introduzione che uno degli 
obiettivi di questo elaborato è quello di focalizzarsi 
sullo sviluppo del software Model Driven a partire dalla 
primissima fase, di verifica dei requisiti, così da..
\end{document}
share|improve this answer
1  
is there any particular reason for suggesting luainputenc here? it's a rather specialised package and certainly not recommended for most luatex documents. – David Carlisle 5 hours ago

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