Nico Schlömer

> regular quads Okay, maybe we're talking about something else when we say "quad". What I mean are these:  (Example taken from the VTK manual.) Those feature four points...

> But when using solid quads What do you mean by "solid" quads?

> See for example: javelin-tech.com/blog/2012/10/shell-vs-solid-elements This has solid hex/tet elements, and quad shell elements. Still don't get what you mean by "solid quad".

> When I do that I get the error "KeyError: '.inp'" We need the entire error message to diagnose. Anyhow, sounds like you're using an old meshio version.

> "ImportError: No module named lxml". You know what that means: Install lxml!

Problem solved then?

You can't plot data in FEniCS. Just use ParaView.

If I see correctly, there are no actionable items here for us. Feel free to reopen if something isn't working as expected!

For me, your code correctly gives ``` [0.5 0.25] Calling function, z= [0.00217142 0.01304674 0.03492125 0.06746832 0.10959114 0.16029522 0.21862143 0.2833023 0.35280357 0.42556283 0.5 0.57443717 0.64719643 0.7166977 0.78137857 0.83970478 0.89040886 0.93253168...

Different algorithms, different results. Both results are in the order of machine precision, and they differ by less than 10^{-11}. The error indicates that, too. Everything seems in order.