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Resolved with: `func_sol = Function(mpc.function_space)`

How did you download the demo? There are branches for the demos of each release: v0.7.0: https://github.com/jorgensd/dolfinx_mpc/blob/v0.7.0.post1/python/demos/demo_periodic3d_topological.py v0.6.0: https://github.com/jorgensd/dolfinx_mpc/blob/v0.6.1.post1/python/demos/demo_periodic3d_topological.py To me it seems like you are trying to use the...

@astrotheory6 did you resolve your issue?

Closing due to no feedback.

Should wait until https://github.com/FEniCS/dolfinx/pull/2632/ has landed

Thanks for a very detailed description of your problem. I cannot reproduce this using `OpenMPI-4.1.4`, see the attached Dockerfile for the setup of this: ```docker FROM fenicsproject/test-env:v0.5.1-openmpi ENV PETSC_ARCH="linux-gnu-real-32" ARG...

I believe this issue has been resolved. Please re-open if still applicable.

I would strongly recommend scaling your problem such that the cell size is not 2e-5/N this can cause all kinds of other issues, as dolfinx uses double precision, so setting...

You should be able to do this with https://github.com/jorgensd/dolfinx_mpc/blob/master/python/dolfinx_mpc/multipointconstraint.py#L97 where you use the `relation` function to map (x1,y1) to radial scaling * Rotation_matrix * (x1,y1).

That is not a periodic condition then, and you would need to make a custom function to do this (using for instance https://github.com/jorgensd/dolfinx_mpc/blob/master/python/dolfinx_mpc/multipointconstraint.py#L217-L245). A periodic condition (in my opinion) is:...