我正在使用 overleaf 并收到以下错误消息：
\f@nch@och ->\conftitle
\strut
l.176
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
序言如下：
\renewcommand{\encodingdefault}{OT1}
\documentclass[conference]{IEEEtran}
\IEEEoverridecommandlockouts
\renewcommand\IEEEkeywordsname{Keywords}
% The preceding line is only needed to identify funding in the first footnote. If that is unneeded, please comment it out.
\usepackage{fancyhdr}
\usepackage{cite}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{algorithmic}
\usepackage{graphicx}
\usepackage{textcomp}
\usepackage{eso-pic}
\usepackage{xcolor}
\usepackage[ruled,vlined]{algorithm2e}
\usepackage{array}
\usepackage{multirow}
%for ending the para equally
\usepackage{flushend}
%for marking authors with 1, 2 ,3 in upperscript
\newcommand\Mark[1]{\textsuperscript#1}
%to put a line in the middle of a figure
\newcommand{\rulesep}{\unskip\ \vrule\ }
\def\BibTeX{{\rm B\kern-.05em{\sc i\kern-.025em b}\kern-.08em
T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}
\makeatletter
%for adding footer
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands.
%\def\ps@IEEEtitlepagestyle{%
% \def\@oddfoot{\mycopyrightnotice}%
% \def\@evenfoot{}%
%}
%\def\mycopyrightnotice{%
% {\footnotesize 978-1-7281-6099-3/19/\$31.00 \textcopyright2019 IEEE\hfill}% <--- Change here
% \gdef\mycopyrightnotice{}% just in case
%}
%%978-1-7281-3060-6/19/$31.00 ©2019 IEEE
\usepackage{eso-pic}
\newcommand\AtPageUpperMyright[1]{\AtPageUpperLeft{%
\put(\LenToUnit{0.5\paperwidth},\LenToUnit{-1cm}){%
\parbox{0.5\textwidth}{\raggedleft\fontsize{9}{11}\selectfont #1}}%
}}%
\newcommand{\conf}[1]{%
\AddToShipoutPictureBG*{%
\AtPageUpperMyright{#1}
}
}
%This part is for adding copyright in left of first page and page number in right alignment.
% insert page header and footer here for IEEE PDF Compliant
\fancypagestyle{pageStyleOne}{%
\fancyhf{}
\renewcommand{\headrulewidth}{0pt}
\fancyhead[C]{\conftitle}
\fancyfoot[R]{\thepage} % do you want page number on the first page?
\fancyfoot[L]{978-1-6654-4911-3/21/\$31.00 \copyright2021 IEEE}
}
\fancypagestyle{pageStyleTwo}{%
\fancyhf{}
\renewcommand{\headrulewidth}{0pt}
\fancyhead[C]{\conftitle}
\fancyfoot[R]{\thepage} % do you want page number on the first page?
}
%upto this part
\ifCLASSINFOpdf
\else
\fi
\hyphenation{op-tical net-works semi-conduc-tor}
\setcounter{page}{71}
\begin{document}
答案1
您必须\fancyhead[C]{\conftitle}放入\conftitle页面头部但尚未定义它。它可能是会议标题，添加
\newcommand\conftitle{some conference}