> On Jan 16, 2020, at 3:18 AM, Timothée Nicolas <[email protected]>
> wrote:
>
> Actually, for the main solver it works. I'm thinking, could it be due to the
> fact that the second SNES instance is defined in a routine that is called
> somewhere inside the FormFunction of the main SNES? We are improving our
> boundary condition, which becomes quite complex, and we have a small problem
> to solve, so I'm trying to handle it with a SNES. So the two SNES are nested,
> in a sense.
This should be fine. We do this.
Are you sure the inner SNES is actually being called?
Run with -help | grep green does it print a help message for your green
options?
Barry
>
> Timothée
>
> Le mer. 15 janv. 2020 à 23:24, Timothée Nicolas <[email protected]>
> a écrit :
> I can actually use some command line arguments. My line arguments actually
> read
>
> -snes_mf -green_snes_monitor
>
> and the first -snes_mf argument (for the main solver snes) is correctly taken
> into account.
> I will try what Barry suggested, I'll tell you if I find the reason.
>
> Best regards, thanks for your comments
>
> Timothée
>
> Le mer. 15 janv. 2020 à 18:56, Matthew Knepley <[email protected]> a écrit :
> I think that Mark is suggesting that no command line arguments are getting in.
>
> Timothee,
>
> Can you use any command line arguments?
>
> Thanks,
>
> Matt
>
> On Wed, Jan 15, 2020 at 12:04 PM Smith, Barry F. via petsc-users
> <[email protected]> wrote:
>
> Should still work. Run in the debugger and put a break point in
> snessetoptionsprefix_ and see what it is trying to do
>
> Barry
>
>
> > On Jan 15, 2020, at 8:58 AM, Timothée Nicolas <[email protected]>
> > wrote:
> >
> > Hi, thanks for your answer,
> >
> > I'm using Petsc version 3.10.4
> >
> > Timothée
> >
> > Le mer. 15 janv. 2020 à 14:59, Mark Adams <[email protected]> a écrit :
> > I'm guessing a Fortran issue. What version of PETSc are you using?
> >
> > On Wed, Jan 15, 2020 at 8:36 AM Timothée Nicolas
> > <[email protected]> wrote:
> > Dear PETSc users,
> >
> > I am confused by the usage of SNESSetOptionsPrefix. I understand this is
> > required if you have for example different SNES in your program and want to
> > set different options for them.
> > So for my second snes I wrote
> >
> > call SNESCreate(MPI_COMM_SELF,snes,ierr)
> > call SNESSetOptionsPrefix(snes,'green_',ierr)
> > call SNESSetFromOptions(snes,ierr)
> >
> > etc.
> >
> > Then when launching the program I wanted to monitor that snes so I launched
> > it with the option -green_snes_monitor instead of -snes_monitor. But I keep
> > getting the message
> >
> > WARNING! There are options you set that were not used!
> > WARNING! could be spelling mistake, etc!
> > Option left: name:-green_snes_monitor (no value)
> >
> > What do I miss here?
> >
> > Best regards
> >
> > Timothée NICOLAS
>
>
>
> --
> 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
>
> https://www.cse.buffalo.edu/~knepley/
