# Package PGF Math Error: Unknown function 'north' (in 'north west') [closed]

I have created the following shape (it has some more features but the error is always the same), based on a rectangle.

\pgfdeclareshape{set}{
%Like in rectangle but without all the separators and height=width
\savedanchor\northeast{%
\pgfmathsetlength\pgf@xb{\pgfkeysvalueof{/pgf/minimum width}}%
\pgf@x=.5\pgf@xb%
\pgf@y=.5\pgf@xb%
}%

\savedanchor\southwest{%
\pgfmathsetlength\pgf@xb{\pgfkeysvalueof{/pgf/minimum width}}%
\pgf@x=-.5\pgf@xb%
\pgf@y=-.5\pgf@xb%
}%

% Inherit from rectangle
\inheritanchorborder[from=rectangle]%
\inheritanchor[from=rectangle]{center}%
\inheritanchor[from=rectangle]{north}%
\inheritanchor[from=rectangle]{south}%
\inheritanchor[from=rectangle]{west}%
\inheritanchor[from=rectangle]{east}%
\inheritanchor[from=rectangle]{north west}%
\inheritanchor[from=rectangle]{north east}%
\inheritanchor[from=rectangle]{south west}%
\inheritanchor[from=rectangle]{south east}%

\backgroundpath{%
\pgfpathrectanglecorners{\southwest}{\northeast}%
}%
}%


Most things work just fine for me. For example:

\node[set,draw, below right=10ex of n, rotate=270, anchor=center] (sA) {};


positions the node perfectly and rotates it. Same with 'below left'.

But if I use

\node[set,draw, above left=10ex of n, rotate=270, anchor=center] (sA) {};


I get the error

Package PGF Math Error: Unknown function 'north' (in 'north west').

The same happens with 'above right'. The output still seems to be fine.

I am using the new version of tikz 3.0.0.

Any ideas to avoid this really disturbing error?

Thank you!

## closed as unclear what you're asking by Paul Gessler, user31729, Andrew Swann, Martin Schröder, Mike RenfroJan 11 '15 at 18:20

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.

• Not the posted code has a problem. But in the shape used for node 'n' the anchors for 'north west' and 'north east' were missing. I fixed it by including \inheritanchor[from=rectangle]{north west} – baghira Mar 26 '14 at 17:26
• Welcome to TeX.SX! Please make your code compilable (if possible), or at least complete it with \documentclass{...}, the required \usepackage's, \begin{document}, and \end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem. – jubobs Mar 26 '14 at 17:27
• I don't have any problems on my system. It works without any errors. Are you including \usetikzlibrary{positioning} at the top? – percusse Mar 26 '14 at 20:34