# Acronyms in section names with classic thesis

I have troubles using acronym package with classicthesis package when I put an acronym in a section name. The least reproducible example I could come up with is this:

\documentclass{scrreprt}

% If I remove the option 'pdfspacing' I got this error:
%
% ! Argument of \@acl has an extra }.
% <inserted text>
%                 \par
%l.21 \section{\acl{GRASP}}

\usepackage[pdfspacing]{classicthesis}

\usepackage{acronym}

\begin{document}

\tableofcontents{}

\chapter{Algorithms}

\section{\acl{GRASP}}

Initial solutions are constructed using \ac{GRASP}.

\chapter{Acronyms}

\begin{acronym}
\end{acronym}

\end{document}


If I run Latex (three times) I got this warning:

...

Package acronym Warning: Acronym grasp' is not defined on input line 25.

LaTeX Font Warning: Font shape OT1/pplj/bx/sc' undefined
(Font)              using OT1/pplj/bx/n' instead on input line 25.

[2]
Chapter 2.
[3] (C:\Users\claudio\Desktop\text\thesis.aux)

LaTeX Font Warning: Some font shapes were not available, defaults substituted.

)
(see the transcript file for additional information)pdfTeX warning (dest): name
{GRASP} has been referenced but does not exist, replaced by a fixed one

...


And in the PDF the section title says grasp!, while other entries are correctly replaced with the acronym.

The only related line I found in the log file (is that the transcript file?) says this:

Package acronym Info: Label acro:GRASP' newly defined as it shall be overridden
although it is yet undefined on input line 27.


But I have no idea how to fix it.

If I comment out the two classicthesis related lines everything is fine.

-
@Sveinung As case-change is a new tag, please consider to replace it with capitalization, or at least to add the latter tag. (BTW, +1 for your answer.) –  lockstep Aug 4 '12 at 13:49
@lockstep Thank you for finding the correct tag. –  Sveinung Aug 4 '12 at 13:52

The error is due to the fact that classicthesis upper- and lowercase the headings. Try using the package textcase with the overload option and enclose the acronym-command with a \NoCaseChange in titles and heading. This MWE compiled fine for me (only one warning regarding an overfull box):

\documentclass{scrreprt}

\usepackage[pdfspacing]{classicthesis}
\usepackage{acronym}

\begin{document}
\tableofcontents{}

\chapter{Algorithms}

\section{\NoCaseChange{\acl{GRASP}}}
Initial solutions are constructed using \ac{GRASP}.

\chapter{Acronyms}
\begin{acronym}

Great, now it works (and I guess it is the same reason why indexes did not work either)! I am not sure I understood your last remark, do you mean I should enclose the acronym with \textsc? Like \acro{GRASP}{\textsc{Greedy Randomized Adaptive Search Procedure}}? Or like \acro{\textsc{GRASP}}{Greedy Randomized Adaptive Search Procedure}? Is there a way to make it automatic? –  Claudio Aug 4 '12 at 14:27
In classicthesis acronyms is typeset with space small caps, as Bringhurst recommends in his book. classicthesis has a command, \spacedlowsmallcaps, which do that. I tried to redefined the relevant command in acronym (see section 2.2 in the acronym’s manual), but it did not work. I suggest you ask a new question regarding that, because then one of the gurus for certain will come up with a solution. –  Sveinung Aug 4 '12 at 16:51