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RE: Petsc + BlockSolve95


  Hmm, can anyone reproduce this in the debugger? What is the value
of op in MatSetOption_MPIAIJ() that is not accepted?

  Is this also Fortran?

   Barry

BTW: I have updated petsc-dev to print the numerical value of any
op that it claims is "unknown", instead of providing NO useful information
like it use to.

On Wed, 10 May 2006, Vaz, Guilherme wrote:

Hello people,



I have exactly the same problem as Faiza...

In sequential it runs ok but in parallel not.



Greetings.



Guilherme



-----Original Message-----
From: owner-petsc-users@xxxxxxxxxxx [mailto:owner-petsc-users@xxxxxxxxxxx] On Behalf Of Boulahya Faïza
Sent: 10 May 2006 10:39
To: 'petsc-users@xxxxxxxxxxx'
Subject: RE: Petsc + BlockSolve95



Thanks.



I tried something else :

   - creation of the matrix with MatCreateMPIAIJ

   - initialization

   - adding of the options MAT_SYMMETRIC and MAT_SYMMETRY_ETERNAL



When solving in sequential CG + ICC, everything is ok. When I tried in parallel the same code the options lead to the same error :

[0]PETSC ERROR: MatSetOption_MPIAIJ() line 1251 in src/mat/impls/aij/mpi/mpiaij.c
[0]PETSC ERROR: No support for this operation for this object type!
[0]PETSC ERROR: unknown option!
[0]PETSC ERROR: MatSetOption() line 4137 in src/mat/interface/matrix.c

Can MatSetOption be only used in sequential?





Faïza





________________________________

De : Matthew Knepley [mailto:knepley@xxxxxxxxx]
Envoyé : mardi 9 mai 2006 18:19
À : petsc-users@xxxxxxxxxxx
Objet : Re: Petsc + BlockSolve95

I believe there is a problem with the option that you specified. All these
are integers, and it is complaining that the integer does not match
MAT_SYMMETRIC. I will fix the error message to print the offending
option, but please check the code.

 Thanks,

    Matt

On 5/9/06, Boulahya Faïza <F.Boulahya@xxxxxxx> wrote:

Hi All,



Has anyone used Conjugate Gradient Solver + Icomplete Cholesky Preconditionner in parallel case? I tried as said in the manual : I use MATMPIROWBS for the storage of the matrice. However I get this message :



PETSC ERROR: To use incomplete Cholesky
                       preconditioning with a MATMPIROWBS matrix you must declare it to be
                       symmetric using the option MatSetOption(A,MAT_SYMMETRIC)!



So I tried adding this option (even if in the namual it is written that it is not required). Then I obtained this message

PETSC ERROR: MatSetOption_MPIRowbs() line 1411 in src/mat/impls/rowbs/mpi/mpirowbs.c
PETSC ERROR: No support for this operation for this object type!
PETSC ERROR: unknown option!
PETSC ERROR: MatSetOption() line 4137 in src/mat/interface/matrix.c



In advance thanks,





Faïza




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