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 <[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 or *-ksp_norm_type unpreconditioned* 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
