SNESSetApplicationContext usage

[Vijay S. Mahadevan]

Matt,

The first method from my previous email works fine. If I use
SNES(Set/Get)ApplicationContext, I can store and retrieve user objects from
the SNES object. And this is what I wanted.

Thanks for the help and clarifying my mistake.

Vijay

> -----Original Message-----
> From: owner-petsc-users at mcs.anl.gov [mailto:owner-petsc-users at mcs.anl.gov]
> On Behalf Of Matthew Knepley
> Sent: Tuesday, March 25, 2008 9:16 PM
> To: petsc-users at mcs.anl.gov
> Subject: Re: SNESSetApplicationContext usage
> 
> On Tue, Mar 25, 2008 at 8:54 PM, Vijay S. Mahadevan <vijay.m at gmail.com>
> wrote:
> > Hi,
> >
> >  I am trying to use the SNESSetApplicationContext function to set an
> object
> >  as a user application context. This is being done after the SNESSolve
> was
> >  already called once on the SNES object, using a NULL application
> context.
> >
> >  For some reason, after the SNESSetApplicationContext call, the
> application
> >  context on SNES is not being set. I am wondering if maybe I need to set
> some
> >  flag to tell the SNES object to include this new context in further
> residual
> >  and Jacobian calls. I saw the code for the SNESSetApplicationContext
> >  function and it doesn't look like it but may be I am missing something
> ?
> 
> There is a misunderstanding. The application context is separate from both
> the
> Function context and the Jacobian context. If you want to change these,
> you
> must call SetFunction/Jacobian() again.
> 
>   Matt
> 
> >  Thanks for the help.
> >
> >  Vijay
> > 
> 
> 
> --
> 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
> 

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