在下面的代码中，我有一个主文件和一个章节。章节的标题是
The Tale of Rabbit Reproduction: $a_{n} = a_{n-1} + a_{n-2}$
我将其编码为
The Tale of Rabbit Reproduction: \texorpdfstring{$a_{n} = a_{n-1} + a_{n-2}$}{a[n] = a[n-1] + a[n-2]}
我收到以下错误信息。
! Font U/bbold/m/n/24.88=bbold25 at 24.88pt not loadable: Metric (TFM) file not found.
代码中是否存在缺陷？
\documentclass[10pt, oneside]{book}
% packages
\usepackage{amssymb, amsmath, amsthm}
%This package allows Chapter titles to be single spaced.
\usepackage{titlesec}
\titleformat{\chapter}[display]
{\setstretch{0.25}\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter}{20pt}{\Huge}
\titleformat{\section}
{\setstretch{0.25}\normalfont\Large\bfseries}{\thesection}{1em}{}
\titleformat{\subsection}
{\singlespacing\normalfont\large\bfseries}{\thesubsection}{1em}{}
\titleformat{\subsubsection}
{\singlespacing\normalfont\normalsize\bfseries}{\thesubsubsection}{1em}{}
% these make top, right, bottom margins confirming to the requirements
\usepackage[a4paper,bindingoffset=0.0in,%
left=1.5in,right=1in,top=1in,bottom=1in,%
footskip=.25in]{geometry}
\usepackage{setspace}
\usepackage{blindtext}
% small stuff
\usepackage{amsfonts}
\usepackage{amscd}
\usepackage{mathbbol}
\usepackage{hyperref}
\urlstyle{same}
\usepackage{footnote}
\hypersetup{colorlinks,linkcolor={black},citecolor={black},urlcolor={black}}
\usepackage{microtype}
% \usepackage{showkeys}
% uncomment this when editing cross-references
\numberwithin{equation}{section}
%------------------------------------------------
% doesn't count introduction when numbering theorems, etc.
\setcounter{chapter}{0}
% makes page numbers appear
\pagestyle{plain}
\usepackage{showframe}
\renewcommand*\ShowFrameLinethickness{0.2pt}
\renewcommand*\ShowFrameColor{\color{blue}}
\begin{document}
% makes the page numbers roman numerals, doesn't count
% these pages in the table of contents
\frontmatter
\thispagestyle{empty}
\vbox to 1truein{}
\centerline{Fairy Tales throughout History}
\vskip 200pt
\centerline{BY}
\vskip 10pt
\centerline{A Storyteller}
\vskip 10pt
\centerline{BA, Bard College}
\centerline{MA, Columbia University}
\vskip 215pt
\centerline{DISSERTATION}
\vskip 10pt
\centerline{Submitted in partial fulfillment of the requirements for}
\centerline{the degree of Doctor of Philosophy in English}
\centerline{in the Graduate School of}
\centerline{Columbia University}
\newpage
\thispagestyle{empty}
\vbox to 8.5truein{}
\centerline{\copyright\ Copyright by A Storyteller 2023}
\
\centerline{All Rights Reserved}
\newpage
\chapter*{Abstract}
\begin{doublespace}
Fairy tales' rich, imaginative stories for children~---~involving fantastical creatures and exotic places~---~offer far more than entertainment and happily-ever-after endings. They furnish children with a landscape for critical thinking skills and a context in which children can evaluate their own emotions and decision making.
\end{doublespace}
\newpage
\chapter*{Dedication}
\bigskip
\centerline{Dedicated to the Grimm Brothers and Hans Christian Anderson}
\newpage
\chapter*{Acknowledgements}
I wish to thank Walt Disney for animating various fairy tales in full color.
\newpage
\tableofcontents
% Changes page numbers to regular numbers, resets the counter
\mainmatter
%This gives 10pt font with 20pt spacing, text from here should be double spaced
\fontsize{10}{20pt} \selectfont
% \include puts in the .tex file with the given name
% make sure that these files don't have any preamble material
\begin{doublespacing}
\include{March_30-Introduction}
%\include{March_30-Chapter_1}
%\include{March_29-Chapter_2}
\end{doublespacing}
% add a new chapter without a chapter # for the references
\addcontentsline{toc}{chapter}{Bibliography}
\begin{thebibliography}{9}
\bibitem[Southey 1837]{Southey}Robert Southey, \emph{The Doctor}, Longman, Rees, Orme, Brown, Green and Longman, London, England, 1837, pages 318-326
\end{thebibliography}
\end{document}
这是文件中的唯一章节。
%
%
%
% Introduction
%
%
% make introduction a chapter without a #
\chapter*{Introduction (In case I decide to have a more descriptive name for the introduction, I want it to be single spaced or maybe half-line spaced)}
% and include it on the table of contents
\addcontentsline{toc}{chapter}{Introduction}
We will look at various fairy tales and myths in civilizations throughout history!
\newcommand\mymath{\(\sin(x) + 2ab - \frac{e^{2x}+1}{e^{2x}-1}\)}
\chapter{The Tale of Rabbit Reproduction: \texorpdfstring{$a_{n} = a_{n-1} + a_{n-2}$}{a[n] = a[n-1] + a[n-2]}}
答案1
来自福尔摩斯级别的调查遥远的路看起来好像过去ubbold.fd在.../texmf-dist/tex/latex/jknapltx/我使用某种 TeXLive 基础 TeX 安装的地方有一个有问题的文件。根据我在那里解读的内容，这可能解释了bbold25错误消息中显示的内容。
在我的 TeXLive 2023 上，这个目录中没有。我Ubbold.fd在 中有一个texmf-dist/tex/latex/bbold。这个应该不会造成问题。该bbold包提供了一个\mathbb 命令。
我建议您\listfiles在序言中添加并报告日志中显示的内容*File List*。（主要是为了了解您正在使用哪种分布，它是最新的吗？）
也许你有一些这样的旧的ubbold.fd在某个texmf-local？或在texmf你的$HOME？
可能是添加一个名为ubbold.fd的文件
\DeclareFontFamily{U}{bbold}{}
\DeclareFontShape{U}{bbold}{m}{n}
{ <5> <6> <7> <8> <9> gen * bbold
<10> <10.95> bbold10
<12> <14.4> bbold12
<17.28> <20.74> <24.88> bbold17
}{}
\endinput
在项目目录中可以解决这个问题。也许。也许为了确保万无一失，也可以将其另存为Ubbold.fd。我在 Mac 上，它不区分大小写。也许 LaTeX NFSS 无论如何都会通过将内容变为小写来规范化，但我没有检查过。
答案2
您收到的错误消息与您使用的软件包有关mathbbol，该软件包为额外的数学符号提供了字体。看来软件包所需的字体文件缺失或未正确安装。
确保 TeX Live 或 MiKTeX 是最新的。或者，您可以尝试使用包bbm。