On Thu, Feb 9, 2017 at 7:29 AM, Pierre Jolivet <[email protected]> wrote:
> > On Feb 9, 2017, at 2:17 PM, Matthew Knepley <[email protected]> wrote: > > On Thu, Feb 9, 2017 at 7:06 AM, Pierre Jolivet <[email protected] > > wrote: > >> >> On Feb 9, 2017, at 1:37 PM, Matthew Knepley <[email protected]> wrote: >> >> On Thu, Feb 9, 2017 at 4:56 AM, Pierre Jolivet <pierre.jolivet@ >> enseeiht.fr> wrote: >> >>> 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? >> >> >> No, I’m just using -ksp_view and -ksp_pc_side right. In the “standard” >> case, it obviously work. >> However, the error is triggered if I set -ksp_pc_side right after a first >> call to KSPSetOperators()/KSPSetUp() without destroying the KSP. >> Should I destroy my KSP before changing from left- (default) to >> right-preconditioning if KSPSetOperators()/KSPSetUp has already been called? >> > > Its likely you have to use > > http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/KSP/ > KSPSetNormType.html > > or > > *-ksp_norm_type unpreconditioned* > > > If I use this after my first call to KSPSetUp, I now end up with: > [0]PETSC ERROR: KSP gmres does not support UNPRECONDITIONED with LEFT > Yes, you would need to use it at the same time that you change the preconditioning side. Thanks, Matt > since we would not have a chance to change it since its been set already. > > Thanks, > > Matt > > Thanks. >> >> Thanks, >> >> Matt >> >> >>> 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 >> >> >> > > > -- > 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 > > > -- 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
