the version Problem

[ljeft]

Hello
Now FENICS has changed the name of vtkplotter to vedo, now it cannot run your code, can not import datadir from vtkplotter, I want to know the FENICS version you use

[Woodchuk]

I used Fenics 2019 for these sims. I would recommend migrating to Fenicsx. See https://github.com/Woodchuk/Fenicsx for an example (more to be added later).

[ljeft]

Now I'm just starting to learn FENICS, and FENICSX documentation is much less than FENICS, so the FENICS version I installed is 2019.2.0.dev0, and I'm having a lot of problems trying to run your code. After I solved the vtkplotter problem, now the Solution failed to converge in 0 iterations, I don't know if it is a version problem. Instead of asking questions in the forum, it may be more effective to ask you directly.
`*** DOLFIN encountered an error. If you are not able to resolve this issue
*** using the information listed below, you can ask for help at

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*** fenics-support@googlegroups.com

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*** Remember to include the error message listed below and, if possible,
*** include a minimal running example to reproduce the error.

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*** -------------------------------------------------------------------------
*** Error: Unable to solve linear system using PETSc Krylov solver.
*** Reason: Solution failed to converge in 0 iterations (PETSc reason DIVERGED_PC_FAILED, residual norm ||r|| = 0.000000e+00).
*** Where: This error was encountered inside PETScKrylovSolver.cpp.
*** Process: 0

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*** DOLFIN version: 2019.2.0.dev0
*** Git changeset: ubuntu`