when I run the Taylor green code as in the navier-stokes-multimesh-2018-dokken-zenodo , it come the above error. So how can I do to debug this.
Are you using the specified docker image (from the README.md):
To get a dolfin image, using the MultiMesh uflacs implementation, there is a docker image [available](https://hub.docker.com/r/dokken92/multimesh-uflacs/dockerfile).
To download it, run `docker pull dokken92/multimesh-uflacs`.
I just use install the fenics in ubuntu, and run the code.
As the MultiMesh Navier stokes code used a custom versions of ufl and ffc, you need to use specific branches from custom repositories:
https://bitbucket.org/magneano/ufl.git@magne/uflacs-custom-integrals
https://bitbucket.org/magneano/ffc.git@evaluate-reference-basis
The easiest way to use these custom branches is by using the docker image referenced to in the README referenced in the previous post.