For no apparent reason, my LaTeX suddenly started giving the following error. I have using the LaTeX on this Linux machine (a fedora 14) for 2 years with no problems. I have never seen this error before and the LaTeX file has not been changed as far as I can remember. Can someone explain to me what's happening and what I should do? Thanks.

Xy-pic option: Frame and Bracket extension v.3.14 loaded)
Xy-pic option: Computer Modern tip extension v.3.7
Xy-pic option: More Tips extension v.3.9
\def
l.35 \xyfont@\xy@@blfont
=xylubt10
! ==> Fatal error occurred, no output PDF file produced!


Latex code:

\documentclass[a4paper,12pt]{scrbook}
\usepackage{amsmath,amssymb,amsthm}
\usepackage{parskip}
\usepackage{lastpage}
\usepackage{color,graphicx}
\usepackage{pgf}
\usepackage[all]{xy}
\usepackage{tikz}
\usetikzlibrary{arrows}
\usepackage{pgf,pgfarrows,pgfnodes}

\begin{document}
\thispagestyle{empty}

\begin{center}
\begin{tikzpicture}
\draw[line width=0.04cm,black,<-] (0.0,0.0) -- (1.0,1.0);
\draw[line width=0.1cm,red,->] (3.0,0.0) -- (6.0,2.0);
\draw[line width=0.2cm,red,<->,dashed] (6.0,0.0) -- (9.0,2.0);
\draw[line width=0.1cm,blue,|<->|] (9.0,0.0) -- (12.0,2.0);
\draw[line width=0.05cm,blue,<<->>] (12.0,0.0) -- (15.0,2.0);
\draw[gray] (0.0,0.0) -- (0.0,2);
\draw[gray] (1.0,0.0) -- (1.0,2);
\draw[gray] (2.0,0.0) -- (2.0,2);
\draw[gray] (3.0,0.0) -- (3.0,2);
\draw[gray] (4.0,0.0) -- (4.0,2);
\draw[gray] (5.0,0.0) -- (5.0,2);
\draw[gray] (6.0,0.0) -- (6.0,2);
\draw[gray] (7.0,0.0) -- (7.0,2);
\draw[gray] (8.0,0.0) -- (8.0,2);
\draw[gray] (9.0,0.0) -- (9.0,2);
\draw[gray] (10.0,0.0) -- (10.0,2);
\draw[gray] (11.0,0.0) -- (11.0,2);
\draw[gray] (12.0,0.0) -- (12.0,2);
\draw[gray] (13.0,0.0) -- (13.0,2);
\draw[gray] (14.0,0.0) -- (14.0,2);
\draw[gray] (15.0,0.0) -- (15.0,2);
\draw[gray] (0.0,0.0) -- (15,0.0);
\draw[gray] (0.0,1.0) -- (15,1.0);
\draw[gray] (0.0,2.0) -- (15,2.0);
\draw(0, 0) node [font=\ttfamily, label=below:{\texttt{0}}] {};
\draw(1, 0) node [font=\ttfamily, label=below:{\texttt{1}}] {};
\draw(2, 0) node [font=\ttfamily, label=below:{\texttt{2}}] {};
\draw(3, 0) node [font=\ttfamily, label=below:{\texttt{3}}] {};
\draw(4, 0) node [font=\ttfamily, label=below:{\texttt{4}}] {};
\draw(5, 0) node [font=\ttfamily, label=below:{\texttt{5}}] {};
\draw(6, 0) node [font=\ttfamily, label=below:{\texttt{6}}] {};
\draw(7, 0) node [font=\ttfamily, label=below:{\texttt{7}}] {};
\draw(8, 0) node [font=\ttfamily, label=below:{\texttt{8}}] {};
\draw(9, 0) node [font=\ttfamily, label=below:{\texttt{9}}] {};
\draw(10, 0) node [font=\ttfamily, label=below:{\texttt{10}}] {};
\draw(11, 0) node [font=\ttfamily, label=below:{\texttt{11}}] {};
\draw(12, 0) node [font=\ttfamily, label=below:{\texttt{12}}] {};
\draw(13, 0) node [font=\ttfamily, label=below:{\texttt{13}}] {};
\draw(14, 0) node [font=\ttfamily, label=below:{\texttt{14}}] {};
\draw(15, 0) node [font=\ttfamily, label=below:{\texttt{15}}] {};
\draw(0, 0) node [font=\ttfamily, label=left:{\texttt{0}}] {};
\draw(0, 1) node [font=\ttfamily, label=left:{\texttt{1}}] {};
\draw(0, 2) node [font=\ttfamily, label=left:{\texttt{2}}] {};
\end{tikzpicture}

\end{center}

\end{document}


## closed as unclear what you're asking by user36296, Phelype Oleinik, Stefan Pinnow, egreg, MicoFeb 10 '18 at 17:30

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Please give a Minimum Working Example to help people help you. People need to see the code that produced the error. Obviously you won't give a working example, but give an example which is the minimum you need to demonstrate the problem. There should be information about this somewhere but I have not used this site all that much and I can't find it! – cfr Dec 15 '13 at 4:29
• I've added a short snippet of my latex file that produces the error. The reason why I did not include the code is because it has always been working. I suspect it's not the latex code. Maybe it's something to do with latex or some bizarre issue with file permission?? – user2926204 Dec 15 '13 at 4:38
• It certainly compiles OK here so yes. It is not finding a font. Have you updated your TeX installation at all? – cfr Dec 15 '13 at 4:46
• This was compiled on a fedora 14 machine which is about 2 years old. But the latex has always been working for that past 2 years. (This is a virtual machine -- I have another more recent fedora 19). I was just reading the pdf and thought that I'll just re-make the pdf. Lo and behold, pdflatex cannot finish the job. Since it works for you, I can only conclude that something else is happening .... Anyway, thanks for compiling it on your machine. I'll have to go back to banging my head a little more ... – user2926204 Dec 15 '13 at 4:58
• By the way, there might be an easier way to plot the tikZ graph. Will you mind posting it as another question? (I am still learning the ins and outs of tikZ as well). – Yiannis Lazarides Dec 15 '13 at 14:04