[luatex] error opening generated PDF in Adobe Reader

[Matthias Schneider]

Hi,

I'm getting an error in Adobe Reader when I open the PDF generated by 
the following input (replace anyPNG with a valid PNG filename):

\documentclass{article}

\usepackage{luacode}

\usepackage[T1]{fontenc}

\usepackage{graphicx}


\begin{document}


\begin{luacode}

os.setlocale('de_DE.UTF-8')

tex.print(os.date('%A %x'))

\end{luacode}


\begin{figure}[t]

\includegraphics[width=0.25\textwidth]{anyPNG}

\end{figure}


\end{document}



Any idea what the problem might be?


thanks,
Matthias