\documentclass[hyperref={pdfpagelabels=false},xcolor=dvipsnames]{beamer}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{color}
\usepackage{lmodern}
\usefonttheme[onlymath]{serif}
\usepackage{pdfpages}
\usepackage{amsmath}
\usepackage[absolute,overlay]{textpos}
\usepackage{graphicx}
\usetheme{Boadilla}
%\usepackage{subfigure}
\usepackage{caption}
\usepackage{tikz}
\captionsetup{labelformat=empty,labelsep=none}
\usepackage{xecolor}
\usepackage{makeidx}
\usepackage{verbatim}
%%%%%%%%%%%% table
%\usepackage[latin1]{inputenc}
\usepackage{caption}
\captionsetup{labelformat=empty,labelsep=none}
\usepackage{colortbl}
\usepackage{multirow}
\usepackage{hyperref}
\usepackage{booktabs}
%\usepackage[colorlinks,linkcolor=blue,citecolor=blue]{hyperref}
\usepackage{ifthen}
\usepackage{hhline}
\usepackage{pstricks-add}
\psset{xunit=1.0cm,yunit=1.0cm,algebraic=true,dotstyle=o,dotsize=3pt 0,linewidth=0.8pt,arrowsize=3pt 2,arrowinset=0.25}
%%%%%%%%%%%%%%% Color of Bullet
\newcommand*\MyPitem{%
\item[\color{fg=brown!35!red}\scalebox{1.1}{\textbullet}]}
\newcommand*\MyCitem{%
\item[\color{pink}\scalebox{1.1}{\textbullet}]}
%%%%%%%%%%%%%%%%%5 Color of block
\newenvironment{variableblock}[3]{%
\setbeamercolor{block body}{#2}
\setbeamercolor{block title}{#3}
\begin{block}{#1}}{\end{block}}
%%%%%%%%%%%%%%%%%%%%5
\addtobeamertemplate{frametitle}{\vskip1.5ex}{}
%\usepackage{subfig}
\usepackage{epstopdf}
\usepackage{hyperref}
\usepackage[labelformat=empty]{caption}
\usepackage{setspace}
\usepackage[T1]{fontenc}
\usepackage[super,numbers,sort & compress]{natbib}
\usepackage[labelformat=empty]{caption}
\usepackage{xcolor}
\setbeamercolor{structure}{fg=green!55!blue}
\usepackage{lipsum}
\setbeamercolor{subsection in toc}{fg=green!70!blue}
%%%%%%%%%%%%%%55
\makeatletter
\setbeamertemplate{footline}
{
\leavevmode%
\hbox{%
\begin{beamercolorbox}[wd=.143333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
\usebeamerfont{author in head/foot}\insertshortauthor
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.593333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
\usebeamerfont{title in head/foot}\insertshorttitle
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.263333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
\usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
\insertframenumber{} / \inserttotalframenumber\hspace*{2ex}
\end{beamercolorbox}}%
\vskip0pt%
}
\makeatother
\begin{document}
\begin{frame}
\hspace{3cm}
\vspace{2.3cm}
\titlepage
\end{frame}
%%%%%%%%%%%%%%%%%%55
\setbeamertemplate{headline} {
\begin{beamercolorbox}[ht=2ex]{section in head/foot}
\insertsectionnavigationhorizontal{\paperwidth}{\hskip0pt plus1fill}{\hskip0pt plus1fill}
\end{beamercolorbox}
}
%%%%%%%%%%%%%%%%%%%%%
%
\usebackgroundtemplate{%
\includegraphics[width=\paperwidth,height=2.5cm]{}}
%$ $ $ $
\logo{%
\includegraphics[width=1cm,height=1cm,keepaspectratio]{logo}%
}
\begin{frame}
\frametitle{Outline}
\tableofcontents[subsubsectionstyle=hide].
\end{frame}
\logo{%
\includegraphics[width=1cm,height=1cm,keepaspectratio]{}%
}
\logo{%
\includegraphics[width=1cm,height=1cm,keepaspectratio]{logo}%
}
When I compile, it displays the error:
though it generates the PDF file correctly. I'd like to get it working correctly since it is a little annoying to get that error every time I compile.
I removed \usepackage{subfig} to solve one error about Undefined control sequence \begin{ducument}
and this command have this error::
'not found .\end{frame}`

\includegraphics{}as this looks for a file with an empty file name (unless you make sure you have an image without a name) – samcarter_is_at_topanswers.xyz May 02 '16 at 17:20\logo{\includegraphics[...]{...}}in four places? Why isn't one enough? – May 02 '16 at 17:29{}. – samcarter_is_at_topanswers.xyz May 02 '16 at 17:34inputencorfontencorepstopdf– David Carlisle May 02 '16 at 17:35\end{document}. You are loading many packages twice or more with incompatible options. You are loading packages loaded by Beamer. You are loading packages which you cannot possibly need or make no sense with Beamer. You are using\makeatletter ... \makeatotheraround code which contains no@. It is not, to be honest, surprising if it doesn't compile without error. But the specific error appears to be that you have used the environmentducument, which is not defined, rather thandocument, which would be. But your MWE will not reproduce this error. – cfr May 02 '16 at 19:12subfig. – cfr May 02 '16 at 19:13