[petsc-users] Simple KSP with known solution gives infinite solution

[Smith, Barry F.]

  Ok, thanks for the update.


> On May 23, 2018, at 3:30 PM, zakaryah <zakaryah at gmail.com> wrote:
> 
> Hi Barry - I did upload the code but I think I found a solution.  Previously, I was trying to use the DMDA separately from the KSP, which probably doesn't make much sense.  Now I am setting things up properly with KSPSetDM, KSPSetComputeRHS, and KSPSetComputeOperators.  Everything seems to be working now - sorry for the bother.
> 
> On Wed, May 23, 2018 at 2:18 PM, Smith, Barry F. <bsmith at mcs.anl.gov> wrote:
> 
>   Please email the code to petsc-maint at mcs.anl.gov
> 
> 
> > On May 23, 2018, at 1:09 PM, zakaryah <zakaryah at gmail.com> wrote:
> > 
> > I get:
> > 
> > [0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
> > [0]PETSC ERROR: No support for this operation for this object type
> > [0]PETSC ERROR: KSP gmres does not support PRECONDITIONED with RIGHT
> > [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting.
> > [0]PETSC ERROR: Petsc Release Version 3.8.2, Nov, 09, 2017 
> > [0]PETSC ERROR: ./KSPtest on a arch-linux2-c-debug named login01.hpc.rockefeller.internal by zakaryah Wed May 23 14:06:24 2018
> > [0]PETSC ERROR: Configure options --prefix=/ru-auth/local/home/zakaryah/PETSc-3.8.2 --download-fblaslapack --download-mumps --download-hypre --download-metis --download-parmetis --download-scalapack
> > [0]PETSC ERROR: #1 KSPSetUpNorms_Private() line 398 in /rugpfs/fs0/home/zakaryah/PETSc/build/petsc-3.8.2/src/ksp/ksp/interface/itcreate.c
> > [0]PETSC ERROR: #2 KSPSetUp() line 303 in /rugpfs/fs0/home/zakaryah/PETSc/build/petsc-3.8.2/src/ksp/ksp/interface/itfunc.c
> > 
> 
>