> 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] > <mailto:[email protected]>> wrote: > >> On Feb 9, 2017, at 2:17 PM, Matthew Knepley <[email protected] >> <mailto:[email protected]>> wrote: >> >> On Thu, Feb 9, 2017 at 7:06 AM, Pierre Jolivet <[email protected] >> <mailto:[email protected]>> wrote: >> >>> On Feb 9, 2017, at 1:37 PM, Matthew Knepley <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> On Thu, Feb 9, 2017 at 4:56 AM, Pierre Jolivet <[email protected] >>> <mailto:[email protected]>> 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 >> >> <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.
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. 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
