[aspect-devel] Trilinos problems ( I guess )

[Jonathan Perry-Houts]

I just got the same error by multiplying a signaling_nan through the
assembly. I thought those were supposed to fail with some sort of...
well... signal. :/

Well, anyway, maybe that's some sort of clue here. I'm not feeling super
motivated to track this down since it's basically a non-issue at this
point, but if anyone searches the mailing list archive in the future
with the same problem, this might help them out.

Cheers,
Jonathan

On 09/09/2015 04:37 PM, Jonathan Perry-Houts wrote:
> I just updated / recompiled deal.ii and aspect on my cluster and now
> aspect is failing every time with a convergence error.
> 
> I attached all the outputs from running convection-box.prm to this email
> (hopefully that works with the listserv). The important part is this
> stuff from stderr:
> 
> ----------- 8< ---- CUT HERE ------ 8< -----
> The iterative Stokes solver did not converge. It reported the following
> error:
> ....
> The iterative (top left) solver in BlockSchurPreconditioner::vmult did
> not converge. It reported the following error:
> ....
> AztecOO::Iterate error code -2: numerical breakdown
> ----------- 8< ---- CUT HERE ------ 8< -----
> 
> This happens for all models I've tried.
> 
> I've never run into this on my desktop, or on the cluster before. I'm
> not sure what could have changed to affect the Stokes solver, but I'm
> not doing anything different in my own workflow so it must have been
> some system library that Trilinos uses, I guess... Any ideas which one
> it could be?
> 
> For reference, I'm using Trilinos 11.12.1, deal.ii development source,
> aspect development source.
> 
> Thanks in advance!
> 
> Cheers,
> Jonathan
> 
> 
> 
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> 

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