On Thu, Feb 9, 2017 at 7:48 AM, Pierre Jolivet <[email protected]> wrote:
> On Feb 9, 2017, at 2:31 PM, Matthew Knepley <[email protected]> wrote: > > 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 <pierre.jolivet@enseei >> ht.fr> 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@enseei >>> ht.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/manualpage >> s/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. > > > Yes, I’m using PetscOptionsInsert, and whether I let PETSc parse > "-ksp_pc_side right -ksp_norm_type unpreconditioned” or "-ksp_norm_type > unpreconditioned -ksp_pc_side right” I end up with the same error > afterwards. > Can you make an example do it (SNES ex5)? Or can you send a small example that does it? Thanks, Matt > Thanks. > > 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 > > > -- 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
