error in creating 3d DA

[Matthew Knepley]

On Mon, Apr 7, 2008 at 2:27 PM, Randall Mackie <rlmackie862 at gmail.com> wrote:
> I've run into a problem with my code where, for a smaller problem, it
>  bombs out in creating a 3D DA (with error message about the partition being
>  too fine in the z direction) for the case where np=121, but works fine
>  for the case np=484.
>
>  I would think that the creation of the DA should work fine for the smaller
>  number of processors as well, but maybe there is a bug in the logic?

DA does only the very simplest partitioning. Thus, the number of processors must
factor into np = np_x * np_y * np_z. However, things will be clearer if you send
the actual error message to petsc-maint at mcs.anl.gov.

  Matt

>  Randy
-- 
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