[petsc-users] EPSViewer in SLEPc

[Kong, Fande]

Thanks, Jose

Fande,

On Fri, Apr 7, 2017 at 4:41 AM, Jose E. Roman <jroman at dsic.upv.es> wrote:

> I have pushed a commit that should avoid this problem.
> Jose
>
> > El 6 abr 2017, a las 22:27, Kong, Fande <fande.kong at inl.gov> escribió:
> >
> > Hi All,
> >
> > The EPSViewer in SLEPc looks weird. I do not understand the viewer
> logic. For example there is a piece of code in SLEPc (at line 225 of
> epsview.c):
> >
> >     if (!ispower) {
> >       if (!eps->ds) { ierr = EPSGetDS(eps,&eps->ds);CHKERRQ(ierr); }
> >       ierr = DSView(eps->ds,viewer);CHKERRQ(ierr);
> >     }
> >
> >
> > If eps->ds is NULL, why we are going to create a new one? I just want to
> view this object. If it is NULL, you should just show me that this object
> is empty. You could print out: ds: null.
> >
> > If a user wants to develop a new EPS solver, and then register the new
> EPS to SLEPc. But the user does not want to use DS, and DSView will show
> some error messages:
> >
> > [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> > [0]PETSC ERROR: Object is in wrong state
> > [0]PETSC ERROR: Requested matrix was not created in this DS
> > [0]PETSC ERROR: See https://urldefense.proofpoint.
> com/v2/url?u=http-3A__www.mcs.anl.gov_petsc_documentation_
> faq.html&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB_
> _aEkJFOKJFd00&r=DUUt3SRGI0_JgtNaS3udV68GRkgV4ts7XKfj2opmiCY&m=
> RUH2LlACLIVsE06Hdki8z27uIfsiU8hQJ2mN6Lxo628&s=
> T1QKhCMs9EnX64WJhlZd0wRvwQB0W6aeVSiC6R02Gag&e=  for trouble shooting.
> > [0]PETSC ERROR: Petsc Release Version 3.7.5, unknown
> > [0]PETSC ERROR: ../../../moose_test-opt on a arch-darwin-c-debug named
> FN604208 by kongf Thu Apr  6 14:22:14 2017
> > [0]PETSC ERROR: #1 DSViewMat() line 149 in /slepc/src/sys/classes/ds/
> interface/dspriv.c
> > [0]PETSC ERROR: #2 DSView_NHEP() line 47 in/slepc/src/sys/classes/ds/
> impls/nhep/dsnhep.c
> > [0]PETSC ERROR: #3 DSView() line 772 in/slepc/src/sys/classes/ds/
> interface/dsbasic.c
> > [0]PETSC ERROR: #4 EPSView() line 227 in /slepc/src/eps/interface/
> epsview.c
> > [0]PETSC ERROR: #5 PetscObjectView() line 106 in/petsc/src/sys/objects/
> destroy.c
> > [0]PETSC ERROR: #6 PetscObjectViewFromOptions() line 2808 in
> /petsc/src/sys/objects/options.c
> > [0]PETSC ERROR: #7 EPSSolve() line 159 in /slepc/src/eps/interface/
> epssolve.c
> >
> >
> >
> > Fande,
>
>
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