Warning: No loadimage plugin for "svg:cairo"

[tdgunes]

Hello there,

I am trying to plot iris dataset in Ubuntu 18.04 bionic, with graphviz package installed. However I am getting svg:cairo warnings and there only arrows with empty boxes. The warnings that I am getting:

Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"
Warning: No loadimage plugin for "svg:cairo"

The figure looks like this:

[parrt]

howdy! yes,This is exactly the problem I ran into on the Macintosh. apparently being able to generate SVG is not the same thing as being able to read the men. And I use matplotlib to generate the individual nodes and then read them in using graphviz. On the Mac I had to explicitly install graphviz with librsvg:

brew install graphviz --with-librsvg --with-app --with-pango

hopefully there is something similar on Ubuntu.

If you get this working, please report back so I can close this and also give me instructions so I can help others. Thanks!

[tdgunes]

I tried installing many combinations packages (including librsvg) but I guess there is an issue with Ubuntu's graphviz package. Someone reported this issue for a similar problem here. I guess the only way to solve this issue is to compile graphviz from scratch in Debian platforms for now.

[parrt]

Can you check out this thread on twitter? somebody is trying to install on Windows / ubuntu.

[parrt]

Just found this for different tool. "On Ubuntu Linux you'd do: $ sudo apt-get install python-dev python-setuptools graphviz plotutils librsvg2-bin" Does that help? https://github.com/wernight/scruffy-server/blob/master/README.md

[tdgunes]

Sorry, but I am still having the same plot.

[parrt]

hm...did you uninstall then reinstall all that crap? i'll try spinning up a linux box soon

[tdgunes]

I have just created a bug report to Ubuntu. For some reason, graphviz debian packages are compiled with --without-rsvg. I made a request to change it. As far as I understand from their package definitions, there shouldn't be any problem with latest Debian and Fedora installations, which the flag is enabled as default.

Also, for eager Ubuntu users: there is a discussion in Japanese I found here, talks about how to recompile graphviz .deb package with rsvg flag for Ubuntu. I have not tried it yet.

[somous-jhzhao]

I have the same problem on windows 10. Did anyone solved this problem?

[parrt]

I'm going to solve this by avoiding need to import svg. See my latest comments here parrt/AniML-java#1

[parrt]

Can you do me a favor check if dot -Tsvg:cairo t.dot > t.svg works on some t.dot like

digraph G { A -> B }

?? I hope it works to generate svg via cairo even if it can't read. @tdgunes
thanks!

[parrt]

Unfortunately from that link by @tdgunes It looks like -Tsvg:cairo also won't work. damn!

can you guys verify at least that dot -Tsvg works?

[BashfulBandit]

@parrt I have already contacted the Debian package maintainer for the graphviz package. He has already changed the packaging to include librsvg. It is now available in Debian Buster.

@tdgunes

[KienVu2368]

@BashfulBandit can I install this graphviz version in Ubuntu to avoid error?

[BashfulBandit]

@KienVu2368 Ubuntu is based off of Debian and uses the same package manager as Debian, so at some point, yes. I don't know how exactly Ubuntu and Debian packages work together though, so I don't know when Ubuntu will be using Debian Buster packages.

[BashfulBandit]

@KienVu2368 I should have also mentioned. If you want a OS which currently installs graphviz properly. Fedora currently packages graphviz with the librsvg dependency correctly and will work by just simply installing graphviz.

[parrt]

Thanks for the help folks. The saga continues.

[parrt]

Ok, dot -Tsvg t.dot > t.svg just worked for me on ubuntu with sudo apt install graphviz. It has embedded image refs to local dir. my embedding code should solve the rest of the issues.

unzip that and run dot. open t.svg and it should show good images.

lll.zip

[parrt]

Making progress. Standby.

[parrt]

Ok, i have linux and windows working outside of jupyter lab.

[parrt]

Fixed by #10

Please note @tdgunes @BashfulBandit @KienVu2368 @somous-jhzhao