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[Murtazo Nazarov <question108259@xxxxxxxxxxxxxxxxxxxxx>]

Question #108259 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/108259

    Status: Answered => Open

Murtazo Nazarov is still having a problem:
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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