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demo-mixed poisson only solves with Epetra, not uBLAS, not PETSc

0 votes

Can anyone reproduce? With the latest trunk my demo-mixed-poisson and demo-mixed-poisson dual stopped converging. With uBLAS I get the message below. I only get the expected solution with Epetra.

%run demo_mixed-poisson-dual.py
Solving linear variational problem.
UMFPACK problem related to call to numeric
*** Warning: UMFPACK reports that the matrix being solved is singular.
UMFPACK problem related to call to solve
*** Warning: UMFPACK reports that the matrix being solved is singular.
asked Apr 11, 2014 by chaffra FEniCS User (1,830 points)

Cannot reproduce on my 1 week old development version of dolfin.

commented Apr 13, 2014 by mikael-mortensen FEniCS Expert (29,340 points)
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