Anders Logg wrote:
Question #108259 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/108259
Status: Open => Answered
Anders Logg proposed the following answer:
On Sat, Apr 24, 2010 at 03:38:42AM -0000, Murtazo Nazarov wrote:
New question #108259 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/108259
Hi,
My solver was working until I recompiled dolfin for some reasons. The Petcs
Krylov solver does not converges:
Solving linear system of size 4184 x 4184 (PETSc Krylov solver).
terminate called after throwing an instance of 'std::runtime_error'
what(): *** Error: PETSc Krylov solver did not converge (PETSc reason -4).
However it works well with LUSolver.
Does anyone had similar problem?
Are you sure it used to converge? We recently changed a warning to an
error, so it might be that your old solver didn't converge but you
only thought it did.
I checked now the output of my old solver. It converged with hypre. But,
now it converges with LUSolver but not with Krylov solver.
I simple solve the mass matrix, after applying Dirichlet boundary
conditions.
murtazo
--
Anders
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