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缺失数字，视为零 (\maketitle)

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缺失数字，视为零 (\maketitle)

因此，我正在使用机构提供的 LaTeX 模板（无支持）撰写论文，但在尝试编译文档时，我总是收到错误。这个错误并不严重，文档编译得很好，看起来也正确，但我想了解导致错误的原因以及我将来如何修复它。

文档使用了自定义的类文件，我尽可能的将其浓缩为最小的成功可编译示例：

\NeedsTeXFormat{LaTeX2e}[1995/12/01]
\ProvidesClass{title_abstract}

\DeclareOption{singlespace}{
        \renewcommand{\textspace}{\relax}
}

\ProcessOptions

\LoadClass[12pt]{report}[1994/06/01]

\def\versiontag{}                    
\def\ds@draft{
        \overfullrule 5pt 
        \def\versiontag{{\normalsize\rm - DRAFT \number\month/\number\day{} -}}
}

\setlength\lineskip{1\p@}          
\setlength\normallineskip{1\p@}
\renewcommand{\baselinestretch}{1}

\renewenvironment{titlepage}
               {\newpage\thispagestyle{empty}
                 \setcounter{page}{\z@}}
               {\newpage}

\newenvironment{abstractpage}
               {\newpage}
               {\newpage}

\newcommand{\department}[1]{\gdef\@department{#1}}

\newcommand{\advisor}[1]{\gdef\@advisor{#1}}

\department{??DEPARTMENT??}
\advisor{??ADVISOR??}
\date{\number\year}

\newcommand{\@member}[1]{\begin{center}
  \raisebox{-8pt}[0pt][17pt]{\rule{2.8in}{.5pt}}\par    
  \raisebox{pt}[3pt][0pt]{#1}\par\end{center}     
  }

\newcounter{@members}           \newcommand{\@membera}{\@member{\@advisor, Supervisor}}
\setcounter{@members}{1}        
\newcounter{@minmembers}

\newcommand{\member}[1]{
  \addtocounter{@members}{1}   
  \ifcase\value{@members} 
    \typeout{Thesis format internal error.  Too few committee members.} \or
    \typeout{Thesis format internal error.  Advisor left off committee.} \or
    \newcommand{\@memberb}{\@member{#1}} \or
    \newcommand{\@memberc}{\@member{#1}} \or
    \newcommand{\@memberd}{\@member{#1}} \or
    \newcommand{\@membere}{\@member{#1}} \or
    \newcommand{\@memberf}{\@member{#1}} \or
    \newcommand{\@memberg}{\@member{#1}} \or
    \newcommand{\@memberh}{\@member{#1}} 
  \else
    \typeout{Error using thesis format.  Too many committee members.}
  \fi
}

\newcounter{@membersprinted}


\def\maketitle{         
  \begin{titlepage}
    \let\footnotesize\small % Local definitions to make \thanks produce
    \let\footnoterule\relax % \normalsize footnotes with no separating rule.
    \setcounter{page}{0}
    \null
    \parskip=0pt
    \begin{center}
      \vglue -.25in   % this makes top margin 2in
      {\Large \scshape\expandafter{\@title} \par}
      \vglue 2ex
      {\normalsize by \par}
      {\large\@author\par\par}
      \vglue 3ex
      {\normalsize Department of \@department\par}
      {\normalsize University\par}
    \end{center}
      \vglue 3ex plus 1fill
        \setcounter{@minmembers}{5} 
      \begin{center}
      \parbox{2.8in}{
        Date:\hfill\rule[-.4ex]{2.35in}{.5pt}\par
        \vspace*{0.01in}
        Approved:
        \vspace*{0.2in}
        { \centering\normalsize
          \setcounter{@membersprinted}{0}
          \loop
          \ifnum \value{@membersprinted} < \value{@members} 
            \addtocounter{@membersprinted}{1}
            \ifcase\value{@membersprinted}
              \typeout{Thesis style--internal error printing members.} \or
            \@membera \or
            \vspace*{0.2in}
            \@memberb \or
            \vspace*{0.2in}
            \@memberc \or
            \vspace*{0.2in}
            \@memberd \or
            \vspace*{0.2in}
            \@membere \or
            \vspace*{0.2in}
            \@memberf \or
            \vspace*{0.2in}
            \@memberg \or
            \vspace*{0.2in}
            \@memberh
            \vspace*{0.2in}            \else \typeout{Thesis style--internal error printing members.}
            \fi
          \repeat
          \loop
          \ifnum \value{@membersprinted} < \value{@minmembers}
            \addtocounter{@membersprinted}{1}
            \@member{}
          \repeat
        }
      }\hfill
      \end{center}
      \vglue 3ex plus 1fill
    \begin{center}
      {\normalsize 
            Dissertation submitted in partial fulfillment of the \par
            requirements for the degree of Doctor of Philosophy \par
          in the Department of \@department \par
          in the Graduate School of \par
          University \par
          \vglue 0.75em
          \@date \par
      }
    \end{center}
    \par\vglue 1ex\@thanks\null
  \end{titlepage}
  \setcounter{footnote}{0} 
  \let\thanks\relax
  \let\maketitle\relax
}

然后我使用以下文件生成文档本身：

\documentclass[PhD]{title_abstract}

\usepackage{parskip}

\author{Me}
\advisor{John Smith}
\member{John Doe}
\member{Jane Doe}
\member{John Roe}
\member{Jane Roe}

\department{Departments}
\title{A Really Great Title}

\begin{document}

\maketitle{}

\end{document}

作为回报，我得到了错误：

l.18 \maketitle
               {}
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Missing number, treated as zero.
<to be read again> 
                   p

每次编译时都会产生 5 次相同的错误。我无法辨别所需的数字在哪里以及为什么 0 是合适的数字。如果有人对此有更深的了解，可以告诉我如何修复此问题，我将不胜感激。我在排版摘要页面时遇到了完全相同的错误（未提供代码），但我想错误来源是并行的，修复一个错误将使我能够修复另一个错误。提前谢谢大家。

答案1

你有

 \raisebox{pt}

因此 tex 看p不到长度，因此

! Missing number, treated as zero.
<to be read again> 
                   p

应该是

     \raisebox{1pt}

或任意长度

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