[petsc-dev] Right-preconditioned GMRES

Matthew Knepley knepley at gmail.com
Thu Feb 9 06:37:30 CST 2017

On Thu, Feb 9, 2017 at 4:56 AM, Pierre Jolivet <pierre.jolivet at enseeiht.fr>

> Hello,
> I _might_ be doing something wrong when calling
> KSPSetFromOptions/KSPSetUp, but still, am I supposed to get this kind of
> error?
> [0]PETSC ERROR: No support for this operation for this object type
> [0]PETSC ERROR: KSP gmres does not support PRECONDITIONED with RIGHT
> If not, I’ll try to send a MWE (it basically depends on where I set the
> option -ksp_pc_side right).

I believe its telling you that it cannot display the preconditioned
residual with right preconditioning, which is true.
Are you requesting both?



> Thanks,
> Pierre

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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