I get three errors when attempting to build the following example (with the tikzpicture taken from the tikz pgf manual). Why does this happen, and what am I doing wrong?
\documentclass[12pt]{article}
\usepackage{tikz}
\begin{document}
\begin{figure}
\begin{tikzpicture}
[Karl's grid/.style ={help lines,color=#1!50},
Karl's grid/.default=blue]
\draw[Karl's grid] (0,0) grid (1.5,2);
\draw[Karl's grid=red] (2,0) grid (3.5,2);
\end{tikzpicture}
\end{figure}
\end{document}
Here is some of the log including the errors:
[Loading MPS to PDF converter (version 2006.09.02).]
\scratchcounter=\count107
\scratchdimen=\dimen148
\scratchbox=\box35
\nofMPsegments=\count108
\nofMParguments=\count109
\everyMPshowfont=\toks24
\MPscratchCnt=\count110
\MPscratchDim=\dimen149
\MPnumerator=\count111
\everyMPtoPDFconversion=\toks25
)
Missing character: There is no [ in font nullfont!
Missing character: There is no K in font nullfont!
Missing character: There is no a in font nullfont!
Missing character: There is no r in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no ' in font nullfont!
Missing character: There is no s in font nullfont!
Missing character: There is no g in font nullfont!
Missing character: There is no r in font nullfont!
Missing character: There is no i in font nullfont!
Missing character: There is no d in font nullfont!
Missing character: There is no / in font nullfont!
Missing character: There is no . in font nullfont!
Missing character: There is no s in font nullfont!
Missing character: There is no t in font nullfont!
Missing character: There is no y in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no = in font nullfont!
Missing character: There is no h in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no p in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no i in font nullfont!
Missing character: There is no n in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no s in font nullfont!
Missing character: There is no , in font nullfont!
Missing character: There is no c in font nullfont!
Missing character: There is no o in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no o in font nullfont!
Missing character: There is no r in font nullfont!
Missing character: There is no = in font nullfont!
! You can't use `macro parameter character #' in restricted horizontal mode.
l.24 [Karl's grid/.style ={help lines,color=#
1!50},
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.
Missing character: There is no 1 in font nullfont!
Missing character: There is no ! in font nullfont!
Missing character: There is no 5 in font nullfont!
Missing character: There is no 0 in font nullfont!
Missing character: There is no , in font nullfont!
Missing character: There is no K in font nullfont!
Missing character: There is no a in font nullfont!
Missing character: There is no r in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no ' in font nullfont!
Missing character: There is no s in font nullfont!
Missing character: There is no g in font nullfont!
Missing character: There is no r in font nullfont!
Missing character: There is no i in font nullfont!
Missing character: There is no d in font nullfont!
Missing character: There is no / in font nullfont!
Missing character: There is no . in font nullfont!
Missing character: There is no d in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no f in font nullfont!
Missing character: There is no a in font nullfont!
Missing character: There is no u in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no t in font nullfont!
Missing character: There is no = in font nullfont!
Missing character: There is no b in font nullfont!
Missing character: There is no l in font nullfont!
Missing character: There is no u in font nullfont!
Missing character: There is no e in font nullfont!
Missing character: There is no ] in font nullfont!
! Package pgfkeys Error: I do not know the key '/tikz/Karl's grid' and I am goi
ng to ignore it. Perhaps you misspelled it.
See the pgfkeys package documentation for explanation.
Type H <return> for immediate help.
...
l.27 \draw[Karl's grid]
(0,0) grid (1.5,2);
This error message was generated by an \errmessage
command, so I can't give any explicit help.
Pretend that you're Hercule Poirot: Examine all clues,
and deduce the truth by order and method.
! Package pgfkeys Error: I do not know the key '/tikz/Karl's grid' and I am goi
ng to ignore it. Perhaps you misspelled it.
See the pgfkeys package documentation for explanation.
Type H <return> for immediate help.
...
l.29 \draw[Karl's grid=red]
(2,0) grid (3.5,2);
(That was another \errmessage.)
I'm using tikz 2010/10/13 v2.10 (rcs-revision 1.76), and am using MikTex on Windows XP in conjunction with Texniccenter.
Best Answer
The problem is caused by the empty line after you opened the
tikzpictureenvironment. Note, that an empty line usually means a paragraph break, so don't use it in the document code just because of readability. If you would like to use (nearly) empty lines for separation, set at least a % into the line to comment it out.It works this way: