[Users] nan using Carpet

[Garrison, David]

Thank you,

That was driving me nuts. It works now.

-DG


> On Oct 30, 2020, at 2:06 PM, Roland Haas <rhaas at illinois.edu> wrote:
> 
> Hello David,
> 
> you should be able to run basic PUGH parfiles with Carpet.
> 
> The one difference that comes to mind is that Carpet by default will
> poison (fill with NaN) unitialized memory while PUGH leaves it the way
> the OS provided it (which usually means either 0 or whatever value it
> had before.
> 
> You an set:
> 
> Carpet::poison_new_timelevels = no
> CarpetLib::poison_new_memory = no
> 
> and if that "fixes" the problem then in fact you have a bug in your
> code and are accessing unitialized memory.
> 
> Can you provide a working example parfile to reproduce the problem?
> 
> Yours,
> Roland
> 
>> Hello,
>> 
>> I’m switching a code I wrote from using PUGH to using Carpet but now I get lots of NAN’s when I run it.  Are there any special parameters needed to run Carpet as unigrid and behave like PUGH?  I am also using MoL and get this issue even when I use Euler methods and trivial initial data.
>> 
>> -DG
>> 
>> _______________________________________________
>> Users mailing list
>> Users at einsteintoolkit.org
>> http://lists.einsteintoolkit.org/mailman/listinfo/users
> 
> 
> -- 
> My email is as private as my paper mail. I therefore support encrypting
> and signing email messages. Get my PGP key from http://pgp.mit.edu .