[MITgcm-support] Re: c51 (fwd)

[Stephanie Dutkiewicz]

Yes, I am using the cd-scheme. So that will explain why 
we can't use the old code to run from our pickup's.

Thank you for the reply.

steph

On Tue, 11 Nov 2003, Jean-Michel Campin wrote:

> Hi Stephanie,
> 
> The modifications are generally "backward compatible",
> meaning that you can use an old pickup with a more recent
> version of the code. 
> 
> But here, it is the reverse that you intend to do.
> There is no guarantee that this should work, and I am not
> too much surprised that this does not. The pickup_cd
> has been changed (between checkpoint50b_pre and checkpoint50b_post)
> and could be the reason why it's not working.
> 
> Are you using the cd_scheme ?
> 
> See you,
> 
> Jean-Michel
> 
> PS: I move this discussion to the support list because Ed says it's better there.
> 
> > Date: Tue, 11 Nov 2003 11:25:24 -0500 (EST)
> > From: Stephanie Dutkiewicz <stephd at ocean.mit.edu>
> > Reply-To: MITgcm-devel at mitgcm.org
> > To: MITgcm-devel at mitgcm.org
> > Subject: [MITgcm-devel] c51 (fwd)
> > 
> > 
> > Hi -
> > I'm including a message from Samar - I gave him a setup and pickup
> > file from a run I did with c51h_pre. He tried to pickup and run it with
> > c48 - and it crashed.
> > He then downloaded c51h_pre and it ran fine (but with some differences
> > occuring).
> > 
> > I am also having a similar problem - I spun up a model with c51h_pre,
> > and then have been trying to continue the run with tracers, but using
> > c46. And it crashes almost immediately.
> > 
> > Have there been changes that make the model not backward compatible?
> >  
> > steph
>