> 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] > <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 > 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
