[petsc-users] MUMPS error reporting in PETSc-3.7

[David Knezevic]

On Sun, Jun 5, 2016 at 1:42 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
> > On Jun 5, 2016, at 12:12 PM, David Knezevic <david.knezevic at akselos.com>
> wrote:
> >
> > In PETSc-3.6, when I hit an error using the MUMPS solver, I would get an
> error like this:
> >
> > [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> > [0]PETSC ERROR: Error in external library
> > [0]PETSC ERROR: Error reported by MUMPS in numerical factorization
> phase: INFO(1)=-9, INFO(2)=351513
> >
> > In PETSc-3.7, the solver now reports "KSP_DIVERGED_PCSETUP_FAILED"
> instead. The new behavior is definitely better, so thanks for the update!
> However, I'd still be curious to be able to see what error codes MUMPS
> returned (which was previously provided in INFO(1) and INFO(2)), since that
> can be helpful for diagnosing the reason for the solver failure. Is that
> info still available somehow?
>
>    David,
>
>      There are a couple of ways to obtain them both clunky, we should also
> provide a simple function call interface such as MatMumpsGetInfo(Mat,int
> *infog,int *info);
>
>      Anyways right now you can run with -info and it prints the
> information (along with too much other information) or you can run with
> -ksp_error_if_not_converged and then it reverts back to the old behavior of
> stopping immediately and printing the error message and info values.
>


OK, got it, thanks!

David
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