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[Anders Logg <question108259@xxxxxxxxxxxxxxxxxxxxx>]

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.

--
Anders

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