# What is the cause of the error “Package keyval Error: orientation undefined”

When I try to compile the following code on Windows using MikTeX and TexWorks,

I get the error "Package keyval Error: orientation undefined".

I understand that it is referring to line 69, which has a \end{frame}. What I do not know is why is this LaTeX code not compiling on Texworks on Windows XP? It works on Kile on an Ubuntu box.

\documentclass[12pt]{beamer}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
% \usepackage{beamerthemebars}
% \usetheme{Berkeley}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{caption}
\usepackage{multicol}
\usepackage{rotating}
\usepackage{fontenc}
\usepackage{graphicx}
\usepackage{geometry}
\usepackage{fancybox}
\usepackage{empheq}
\usepackage{tikz} % for pictures and text as overlay
\usepackage{pgfpages}
% \usepackage{collect}
% \setbeameroption{show notes on second}

\title{EEE C383 Communication Systems}

\AtBeginSection
{
\begin{frame}{Review of Previous Class}
\end{frame}

\begin{frame}
\date{\today}
\frametitle{Where are We ?}
\tableofcontents[currentsection]
\end{frame}

\begin{frame}
\begin{center}
\usebeamerfont{section title}\insertsection
\date{\today}
\end{center}

\end{frame}

}

\usebackgroundtemplate{\includegraphics[width=1.0\paperwidth,height = 1.0
\paperheight, orientation= landscape]{lecture_template.pdf}}

\includeonly{lecture - 3}

\begin{document}
\beamerdefaultoverlayspecification{<+->} % adds pause after every item

\setbeamertemplate{frametitle}[default][center]

\begin{frame}{Introduction}

\end{frame} % This is line 69.....

\begin{frame}{History of Electronic Communication}
%insert timeline from timetoast.com

\end{frame}

\begin{frame}{Communication system}
% Insert three block diagram of a comunication  system

\begin{itemize}
\item Information
\item Source
\item Channel
\item Destination
\end{itemize}

\end{frame}

\end{document}


Errors:

lectures.tex
69
Package keyval Error: orientation undefined.

See the keyval package documentation for explanation.
Type  H <return>  for immediate help.
...

l.69 \end{frame}

-

orientation is an undefined key for \includegraphics. Maybe you're interested in some form of rotation, which you can specify using the angle key-value.

Why did it compile on a different system? Perhaps it passed through the error due to switch -interaction=nonstopmode.

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