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Have you installed the optional package

http://www.sagemath.org/packages/optional/dot2tex-2.8.7-2.spkg

If not this command won't work.

Run the command sage -i dot2tex-2.8.7-2 to install it.

You can find a list of optional packages at

http://www.sagemath.org/packages/optional/

Have you installed the optional package

http://www.sagemath.org/packages/optional/dot2tex-2.8.7-2.spkg

If not this command won't work.

Run the command sage -i dot2tex-2.8.7-2 to install it.

You can find a list of optional packages at

http://www.sagemath.org/packages/optional/

Edit:

Sorry I posted that without trying it out just by looking at the manual, but I managed to solve the problem. Here are the steps I did to make it run.

1)

install optional package dot2tex

2)

install optional package graphviz from the same page (http://www.sagemath.org/packages/optional/)

3)

At the terminal type $sage -sh $easy_install pygraphviz

That way I was able to run a simple pygraphviz example.

Have you installed the optional package

http://www.sagemath.org/packages/optional/dot2tex-2.8.7-2.spkg

If not this command won't work.

Run the command sage -i dot2tex-2.8.7-2 to install it.

You can find a list of optional packages at

http://www.sagemath.org/packages/optional/

Edit:

Sorry I posted that without trying it out just by looking at the manual, but I managed to solve the problem. Here are the steps I did to make it run.

1)

install optional package dot2tex

2)

install optional package graphviz from the same page (http://www.sagemath.org/packages/optional/)

3)

At the terminal type

$sage -sh -sh

$easy_install pygraphviz

That way I was able to run a simple pygraphviz example.