How about clearing the cache when the mesh changes.  This is something
we do a lot in MOOSE now...

Derek

Sent from my iPhone

On Nov 2, 2012, at 12:03 PM, Roy Stogner <royst...@ices.utexas.edu> wrote:

>
> On Fri, 2 Nov 2012, Kirk, Benjamin (JSC-EG311) wrote:
>
>> Cache based on (this)?
>
> Even that's not necessarily safe - we delete Elem objects when we
> coarsen them, after all, and there's nothing stopping new from placing
> a newly created Elem in the same place where an old one just
> disappeared.
> ---
> Roy
>
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