3

I tried an example from the TikZ tutorial:

\documentclass{article}

\usepackage{tikz}
%\usepackage{pgfsys} 
\usetikzlibrary{positioning}
\usetikzlibrary{graphs}
%\usetikzlibrary{arrows}
%\usetikzlibrary{topaths}
\usetikzlibrary{shapes.misc}

\tikzset {
terminal/.style={
rounded rectangle,% : the shape
minimum size=6mm,% size 
very thick,draw=black!50,% border 
top color=white,bottom color=black!20,% filling with shading 
font=\ttfamily % font 
},
nonterminal/.style={
rectangle,% : the shape
minimum size=6mm,% size 
very thick,draw=red!50!black!50,% border 
top color=white,bottom color=red!50!black!20,% filling with shading 
font=\itshape % font 
},
point/.style={circle,inner sep=0pt,minimum size=2pt,fill=red},
skip loop/.style={to path={-- ++(0,#1) -| (\tikztotarget)}},
hv path/.style={to path={-| (\tikztotarget)}},
vh path/.style={to path={|- (\tikztotarget)}}
} % \tikzset

\begin{document}

text

\begin{tikzpicture}
\matrix[row sep=1mm,column sep=2mm] {
% First row:
& & & & & & & & & & & \node (plus) [terminal] {+};\\
% Second row:
\node (p1) [point] {}; &
\node (ui1) [nonterminal] {unsigned integer}; &
\node (p2) [point] {}; &
\node (dot) [terminal] {.}; &
\node (p3) [point] {}; &
\node (digit) [terminal] {digit}; &
\node (p4) [point] {}; &
\node (p5) [point] {}; &
\node (p6) [point] {}; &
\node (e) [terminal] {E}; &
\node (p7) [point] {}; &
 &
\node (p8) [point] {}; &
\node (ui2) [nonterminal] {unsigned integer}; &
\node (p9) [point] {}; &
\node (p10) [point] {};\\
% Third row:
& & & & & & & & & & & \node (minus)[terminal] {-};\\
};
\graph[use existing nodes]  {
p1 -> ui1 -- p2 -> dot -- p3 -> digit -- p4
-- p5 -- p6 -> e -- p7 -- p8 -> ui2 -- p9 -> p10;
%p4 ->[skip loop=-5mm] 
%p3;
% p2 ->%[skip loop=5mm] 
% p5;
% p6 ->%[skip loop=-11mm]
%  p9;
% p7 ->%[vh path] 
% plus -> %[hv path] 
% p8;
% p7 ->%[vh path] 
% minus -> %[hv path] 
% p8;
};
\path (p4) edge [->,skip loop=-5mm] (p3)
(p2) edge [->,skip loop=5mm] (p6);
\end{tikzpicture}
\end{document}

That code works. However, if I replace the edges with skip loop by the ones in the path, so that it looks like in the example, LaTeX tells me:

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/TeX Live for SUSE Linux)
...
! Package pgfkeys Error: I do not know the key '/tikz/graphs/skip loop' and I am going to ignore it. Perhaps you misspelled it.

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

l.90 }
      ;

I Actually uncommented

% p2 ->%[skip loop=5mm] 
% p5;

The same thing happens with the parts of the graph containing vh path and hv path. What am I doing wrong?

It seems as if styles of nodes work but styles of edges do not. I dont understand this....

Maybe the log file for the ok-case i added below gives some hint. I feel, it does not look very smooth, does it?!

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/TeX Live for SUSE Linux) (format=pdflatex 2014.8.9)  9 AUG 2014 20:02
entering extended mode
 restricted \write18 enabled.
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Overfull \hbox (30.17874pt too wide) in paragraph at lines 93--94
[][] 
 []

[1

{/usr/share/texmf/fonts/map/pdftex/updmap/pdftex.map}] (./test.aux) ) 
Here is how much of TeX's memory you used:
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 256968 words of memory out of 5000000
 13455 multiletter control sequences out of 15000+600000
 4154 words of font info for 16 fonts, out of 8000000 for 9000
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Output written on test.pdf (1 page, 33969 bytes).
PDF statistics:
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 18 compressed objects within 1 object stream
 0 named destinations out of 1000 (max. 500000)
 25 words of extra memory for PDF output out of 10000 (max. 10000000)

closed as off-topic by egreg, user13907, Adam Liter, Mensch, Svend Tveskæg Jan 24 '15 at 23:42

  • This question does not fall within the scope of TeX, LaTeX or related typesetting systems as defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

  • Hard to tell. Which code exactly is producing the error? The code you just posted doesn't produce errors in my system even if I uncomment the commented-out parts. – Gonzalo Medina Aug 9 '14 at 17:50
  • improved my post accordingly. ... So if code is ok on your system, the problem is not in code but in my system, probably, right? – user2609605 Aug 9 '14 at 17:52
  • 4
    Yes. As I see from your .log file, your system uses PGF version 2.10; the newest version is 3.0 (that's the one in my system), so I suspect it's all about outdated packages. You could try updating PGF or, even better, your LaTeX system. – Gonzalo Medina Aug 9 '14 at 18:35
  • Hello Gonzalo, that hint helped. well my suse distribution offers that tex and that tikz. Was a little cumbersome to update all, including auctex and octave(!) but now: all right and all problems gone. Thank you for your hint. – user2609605 Aug 10 '14 at 21:37
  • 3
    I'm voting to close this question as off-topic because it's a problem due to using version 2.10 while the code requires version 3 of TikZ/PGF – egreg Jan 24 '15 at 23:09

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