[petsc-users] Could you please give me some advice for the following error

[Matthew Knepley]

On Wed, Sep 4, 2013 at 10:23 AM, 丁老师 <ztdepyahoo at 163.com> wrote:

> yes, i am computing convection diffusion problem with a  triangle
> unstructured grid. the matrix coefficients is unsymemetric.
> but is it a necessary for the parmetis to do the work?
>

The matrix can be nonsymmetric, but it has to be structurally symmetric.

   Matt


> 在 2013-09-04 23:20:47，"Mark F. Adams" <mfadams at lbl.gov> 写道：
>
> My guess is that your matrix is structurally unsymmetric.
>
> On Sep 4, 2013, at 11:16 AM, 丁老师 <ztdepyahoo at 163.com> wrote:
>
>  1] ***ASSERTION failed on line 243 of file
> /home/ztdep/Downloads/petsc-3.3-p6/externalpackages/parmetis-4.0.2-p3/libparmetis/match.c:k
> >= firstvtx && k < lastvtx
> [ 1] 2562 5124 10 0 0
> main:
> /home/ztdep/Downloads/petsc-3.3-p6/externalpackages/parmetis-4.0.2-p3/libparmetis/match.c:243:
> libparmetis__Match_Global: Assertion `k >= firstvtx && k < lastvtx' failed.
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-- 
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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