Solve a symmetric matrix

LECAS Dimitri dimitri.lecas at
Fri Oct 12 07:31:59 CDT 2007

----- Original Message -----
From: Hong Zhang <hzhang at>
Date: Tuesday, October 2, 2007 3:51 pm
Subject: Re: Solve a symmetric matrix

> PCILU and PCICC are not supported for MPISBAIJ matrix type
> (the error message should indicate this problem).
> For sequential sbaij matrix, you can use PCICC.
> For parallel, you may try the default petsc preconditioner
> block jacobi + icc. See Chapter 4 of petsc user manual.

Ok i see.

The problem came from the call to KSPSetUp, when using one MPI task,
this call end in MatILUFactorSymbolic with the error message about
symbolic ILU with Matrix type seqsbaij.

With more than one MPI task, there is no more error.

Dimitri Lecas

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