Texshop cannot typeset .idx files

Question

For some reason, Texshop refuses to typeset my index idx files. I'm working with a mac and a .ltx file

this is my code:

% XeLaTeX can use any Mac OS X font. See the setromanfont command below.
% Input to XeLaTeX is full Unicode, so Unicode characters can be typed directly into the source.

% The next lines tell TeXShop to typeset with xelatex, and to open and save the source with Unicode encoding.

%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode
\documentclass[11pt]{book}
\usepackage{ledmac}
\usepackage{fancyhdr}
\pagestyle{myheadings}
\usepackage{hanging}
\textheight = 180.5 mm
\textwidth = 108.5 mm
\pagenumbering{arabic}
\usepackage{amsmidx} 
\makeindex{nominum}
\makeindex{rerum}

\input{style}
\raggedbottom


\newcommand*{\LeftWidth}{3.0cm}%
\newcommand*{\RightWidth}{\dimexpr\linewidth-\LeftWidth-2em\relax}%
\newcommand{\AlignedBrace}[2]{%
    \medskip\par\noindent%
    \parbox{\LeftWidth}{\raggedleft\textbf{#1}\strut~}%
    $\left\{~\parbox{\RightWidth}{\strut\textit{#2}\strut}\right.$%
}%


%\usepackage{geometry}                % See geometry.pdf to learn the layout options. There are lots.
%\geometry{a4paper}                   % ... or a4paper or a5paper or ... 
%\geometry{landscape}                % Activate for for rotated page geometry
%\usepackage[parfill]{parskip}    % Activate to begin paragraphs with an empty line rather than an indent
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{amsmath}
%\renewcommand %These two commands are for double-spacing
%\baselinestretch{2}

% Will Robertson's fontspec.sty can be used to simplify font choices.
% To experiment, open /Applications/Font Book to examine the fonts provided on Mac OS X,
% and change "Hoefler Text" to any of these choices.

\usepackage{fontspec,xltxtra,xunicode}
\defaultfontfeatures{Mapping=tex-text}
\setromanfont[Mapping=tex-text]{Brill}
\setsansfont[Scale=MatchLowercase,Mapping=tex-text]{Gill Sans}
\setmonofont[Scale=MatchLowercase]{Andale Mono}
\frenchspacing


\begin{document}
.............................
\backmatter
\Printindex{nominum}{Index nominum}
\Printindex{rerum}{Index rerum}
\end{document}

and this is the log file I get:

This is XeTeXk, Version 3.141592-2.2-0.996 (Web2C 7.5.6)
 %&-line parsing enabled.
entering extended mode
(./medlyeM2.ltx
LaTeX2e <2005/12/01>
Babel <v3.8h> and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, arabic, basque, bulgarian, coptic, welsh, czech, slovak, german, ng
erman, danish, esperanto, spanish, catalan, galician, estonian, farsi, finnish,
 french, greek, monogreek, ancientgreek, croatian, hungarian, interlingua, ibyc
us, indonesian, icelandic, italian, latin, mongolian, dutch, norsk, polish, por
tuguese, pinyin, romanian, russian, slovenian, uppersorbian, serbian, swedish, 
turkish, ukenglish, ukrainian, loaded.
(/usr/local/texlive/2007/texmf-dist/tex/latex/base/book.cls
Document Class: book 2005/09/16 v1.4f Standard LaTeX document class
(/usr/local/texlive/2007/texmf-dist/tex/latex/base/bk11.clo))
(/usr/local/texlive/2007/texmf-dist/tex/latex/ledmac/ledmac.sty
(/usr/local/texlive/2007/texmf-dist/tex/latex/ledmac/ledpatch.sty))
(/usr/local/texlive/2007/texmf-dist/tex/latex/fancyhdr/fancyhdr.sty)
(/usr/local/texlive/2007/texmf-dist/tex/latex/hanging/hanging.sty)
(./amsmidx.sty

! LaTeX Error: \printindex undefined.

! LaTeX Error: \indexchap undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.108 \renewcommand{\indexchap}

Answer 1

Here's a stripped down version of a document like you want; you just need to run XeLaTeX on it and the indices will automatically be compiled and produced.

\documentclass[11pt]{book}

\usepackage{imakeidx}
\makeindex[name=nominum,title=Index nominum,intoc]
\makeindex[name=rerum,title=Index rerum,intoc]

\usepackage{fontspec}
\setromanfont[Ligatures=TeX]{Brill}
\setsansfont[Scale=MatchLowercase,Ligatures=TeX]{Gill Sans}
\setmonofont[Scale=MatchLowercase]{Andale Mono}
\frenchspacing


\begin{document}
\frontmatter
\tableofcontents
\mainmatter
\chapter{Title}
Here we mention the name of a famous mathematician, Carl Friedrich 
Gauss\index[nominum]{Gauss, Carl Friedrich} who is very well known
for his work in mathematics\index[rerum]{mathematics} and 
physics\index[rerum]{physics}

\backmatter
\printindex[nominum]
\printindex[rerum]
\end{document}

---

The table of contents

---

The first chapter page

---

The "Index nominum"

---

The "Index rerum"

Answer 2

The \printindex command is defined in the makeindex package so you need to add

\usepackage{makeindex}

You (or your IDE) will also need to run the makeindex program to generate the index after LaTeX has run, and then run latex again to typeset the index.

\indexchap I can not help you with, you code is trying to re define it but it is not defined, perhaps you just need \newcommand rather than \renewcommand or perhaps you intended to load some package that defines it?