[petsc-users] run successfully on 20 processors but failed on 24 processors

[Matthew Knepley]

On Tue, Dec 13, 2011 at 9:49 PM, Xiangdong Liang <xdliang at gmail.com> wrote:

> Hello everyone,
>
> I am solving complex Ax=b with PaStix on 20 processors successfully
> but failed on 24 processors. The relatively error indicated by
> mat_pastix_verbose becomes "nan"  for 24 processors. Where could be
> wrong? Can someone give me some hints on how I can debug? Thanks.


First, make sure you did not put any NaNs in your matrix or rhs.

   Matt


>
> Xiangdong

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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