Overleaf编译报错怎么办？LaTeX会议论文模板20个常见错误及修复方法

Overleaf界面 → 点击红色错误图标（或"Logs and output files"）
→ 查看错误列表 → 点击具体错误跳转到对应行

! Undefined control sequence.
l.45 \begn{equation}

! Missing $ inserted.
l.52 The value of x_1 is...

% 错误：正文中直接写下划线/上标
The value of x_1 is greater than x_2.

% 正确：数学符号用$包裹
The value of $x_1$ is greater than $x_2$.

% 错误：文件名含下划线未转义
\includegraphics{my_figure_v2.pdf}

% 正确（多数情况下路径中的下划线其实没问题，
% 但如果报错可以尝试）：
\includegraphics{my\_figure\_v2.pdf}

! LaTeX Error: \begin{figure} on input line 30 ended by \end{table}.

! Too many }'s.
l.67 }

! LaTeX Error: Missing \begin{document}.

Runaway argument?
! Paragraph ended before \xxx was complete.

% 错误：\textbf内有空行
\textbf{This is bold

text}  % 空行导致错误

% 正确
\textbf{This is bold text}

! LaTeX Error: File `figures/model.png' not found.

! LaTeX Error: Unknown graphics extension: .tif

! LaTeX Error: Float(s) lost.
或
LaTeX Warning: `h' float specifier changed to `ht'.

\begin{figure}[t]    % 优先顶部（学术论文最常用）
\begin{figure}[htbp] % 给LaTeX最大自由度

Overfull \hbox (15.2pt too wide) in paragraph at lines 89--95

% 图片修复
\includegraphics[width=\columnwidth]{fig.pdf}  % 不超过栏宽

% 表格修复：缩小字号
{\small
\begin{tabular}{...}
...
\end{tabular}
}

% 长词断行修复
\usepackage[hyphens]{url}

! LaTeX Error: Not in outer par mode.

LaTeX Warning: Citation `zhang2024method' undefined.

I found no \citation commands---while reading file paper.aux

I was expecting a `,' or a `}'---line 45 of file refs.bib

% 错误：最后一个字段后多了逗号
@article{key,
  author = {Zhang},
  title = {Title},
  year = {2024},   ← 最后一个字段后的逗号（部分情况会报错）
}

% 错误：字段值中有未转义的特殊字符
title = {Method for A & B}   ← & 需要转义为 \&

Warning--I didn't find a database entry for "Zhang2024"

Overfull \hbox (3.5pt too wide) in paragraph at lines 120--125

\sloppy  % 在导言区添加，允许更宽松的断行

Underfull \hbox (badness 10000) in paragraph at lines 88--92

Package hyperref Warning: Token not allowed in a PDF string

% 错误：section标题含数学命令
\section{Analysis of $O(n\log n)$ Algorithm}

% 正确：使用texorpdfstring
\section{Analysis of \texorpdfstring{$O(n\log n)$}{O(n log n)} Algorithm}

! LaTeX Error: \caption outside float.

! LaTeX Error: Option clash for package graphicx.

% 错误：重复加载
\usepackage[pdftex]{graphicx}
\usepackage{graphicx}         % 冲突

% 正确：只保留一个（或不带选项）
\usepackage{graphicx}

Overleaf菜单 → Settings → Compiler → 
选择 pdfLaTeX / XeLaTeX / LuaLaTeX

1. 查看错误日志 → 定位行号和关键词
2. 检查报错行及其前2-3行
3. 对照本文速查表确定错误类型
4. 按对应修复方法处理
5. 重新编译确认错误消失
6. 如有多个错误，优先修复第一个（后续错误可能是连锁反应）