I am getting an Error " cannot determine size of graphic ( no boundingBox)
\documentclass{proposalnsf}
\usepackage{enumitem}
\usepackage{graphicx}
%\usepackage[dvipdfmx]{graphicx}
%\usepackage[numbers,sort&compress]{natbib}
\usepackage[numbers]{natbib}
\setcitestyle{square}
%\usepackage[pdflatex]{graphicx}
%\usepackage{tabularx}
% See this file for a set of pre-defined journal abbreviations
\input{journal-abbreviations.tex}
\newcommand{\degrees}{$!!$\char23$!$}
\renewcommand{\refname}{\centerline{References cited}}
% This handles hanging indents for publications
\def\rrr#1\{\par
\medskip\hbox{\vbox{\parindent=2em\hsize=6.12in
\hangindent=4em\hangafter=1#1}}}
\def\baselinestretch{1}
\begin{document}
\begin{figure}
\centering
\includegraphics[width=0.8\textwidth]{graphical abstract.pdf}
\caption{zzzzz.}
\label{fig: zzzz}
\end{figure}
\newpage
\pagenumbering{arabic}
\renewcommand{\thepage} {E--\arabic{page}}
\bibliographystyle{IEEEtran}
\bibliography{IEEEabrv,draft}
\newpage
\pagenumbering{arabic}
\renewcommand{\thepage} {G--\arabic{page}}
\noindent{\Large \bf BUDGET JUSTIFICATION}
\end{document}
I have tried different things such as using dvipdfmx and pdflatex but nothing worked!