I 've just install Ubuntu and I am using Kile for writing my PhD thesis. I am using both English and Greek and since I start using kile I cannot compile my bibliography. I am receiving the following error messages:
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! LaTeX Error: Command \textEta unavailable in encoding T1.
! LaTeX Error: Command \textkappa unavailable in encoding T1.My preamble is the following:
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\documentclass[a4paper,12pt]{report}
\usepackage[english, greek]{babel} %This is to be able to write Greek
\usepackage[utf8x]{inputenx} %This is to be able to write Greek
\usepackage[LGR,T1]{fontenc} %This is to be able to write Greek
\usepackage{booktabs}
\newcommand{\gr}{\selectlanguage{greek}} %This is a custom command to switch easily to Greek
\newcommand{\en}{\selectlanguage{english}} %This is a custom command to switch easily to English
\usepackage{kerkis} %This is a font for Greek
\usepackage{harvard} %This is the author/date bibliography package
\usepackage{graphicx} %This package allows you to include graphs
\usepackage{lscape} %This package allows you to include landscape pages
\usepackage{setspace} %This packages allows you change the line spacing
\usepackage{threeparttable} %This package allows you to draw tables with notes at the bottom
\usepackage{longtable} %This package allows you to draw tables over multiple pages
\usepackage{multirow} %This package allows you to have tables with text spanning multiple rows and/or columns
\usepackage[unicode]{hyperref}
\usepackage{vmargin} %This is the package to change margings
\setmargnohfrb{40mm}{30mm}{15mm}{30mm} %These correspond to the custom set margins: left, top, right, base
\footskip = 30pt %This is for the footer
\addtolength{\headheight}{7.5pt} %This is to get rid of annoying overfull hbox messages
\pagestyle{plain} %This is to begin the thesis with a different numbering
\renewcommand{\sectionmark}[1]{\markright{#1}} %This is to begin the thesis with unnumbered sections (acknowledgements, etc)
\renewcommand{\chaptermark}[1]{\markboth{#1}{}} %This is to begin the thesis with unnumbered sections (acknowledgements, etc)
\addto\captionsenglish{\renewcommand{\bibname}{\gr Βιβλιογραφία}}
% TITLE PAGE -------------------------------------------------------------
\begin{document}
\begin{titlepage}
\begin{center}
{\Large \gr }
\vspace{2cm} {\large \gr \par}
\vspace{1cm} {\normalsize \gr \par}
\vspace{10cm}
\vspace{0.5cm}
\end{center}
{
\vspace{2cm}
\small \gr
}
\end{titlepage}
% ACKNOWLEDGEMENTS----------------------------------------------------------
\newpage
%\include{acknowledgements}
% TABLE OF CONTENTS ETC------------------------------------------------------------------------
\pagestyle{plain}
\tableofcontents
\listoffigures
\listoftables
%ABBREVIATIONS----------------------------------------------------------
\newpage
%\include{abbreviations}
% ------------------------------------------------------------------------
\newpage
\setlength{\parskip}{3ex}
% INCLUDE CHAPTER FILES---------------------------------------------------
\pagenumbering{arabic}
\include{Chapter1}
%\include{Chapter2}
%\include{Chapter3}
%\include{Chapter4}
%\include{Chapter5}
%\include{Chapter6}
%\include{Appendix}
\addcontentsline{toc}{chapter}{bib}
\en
\bibliographystyle{apsr}
\bibliography{roula}
\end{document}