PETSc Krylov Solver RuntimeError with fine mesh

There is nothing wrong with the input. As far as I can tell, the issue seems to stem from the usage of mumps as the linear solver. If you use “umfpack” or “lu” it seems to be working. Could be memory related as you are running this on a large problem.
See for instance: Dolfin error message converted to PETSC form?

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