[aspect-devel] Some problems with ASPECT

[Timo Heister]

Eliza,

your computation has 8 cells in 3d and you are running with 2 MPI
ranks. As terminal children are not split between processors, you end
up with one processor owning 8 cells and the other one owning 0 cells.
I will take a look at this problem, but for now you should be able to
run with one MPI rank.

On Wed, Jun 1, 2016 at 5:52 PM, John Naliboff <jbnaliboff at ucdavis.edu> wrote:
> Hi Elisa,
>
> The error appears to be related Trillions (solver) related.
>
> After a quick look through the input file, the first thing that stands out
> is that you have a very small number of elements (only one global
> refinement)!  In fact, your total number of degrees of freedom is only 527.
> This very well may be the source of the error.
>
> Can you try systematically adding more global refinements (2, 3, 4 …) to see
> if this solves the issue?  Please report back once you’ve run these tests.
>
> In general for error/debugging purposes,  it is often helpful to backtrack
> through how the model was setup?
>
> Was this model/input file modified from one of the cookbooks?  If so, did
> you modify it in a sequential manner: change one feature, run the model,
> change another feature, etc?  How do you pick the specific parameters in the
> model?
>
> As you continue to get familiar with ASPECT, I strongly recommend taking an
> incremental approach to setting up models.  Change just one or two
> parameters at a time so you have a record of successful model runs.
>
> Also, consider doing the majority of your initial tests in 2-D.  For the
> purposes of getting to know the code, there are few advantages to running
> 3-D simulations, which are computationally more expensive and often harder
> to troubleshoot.
>
> Cheers,
> John
>
> *************************************************
> Assistant Project Scientist, CIG
> Earth & Planetary Sciences Dept., UC Davis
>
>
>
>
>
> On Jun 1, 2016, at 5:33 AM, ELISA FIERRO <elisa.fierro at unicam.it> wrote:
>
> Dear all,
>
> I began to use ASPECT (version 1.5 - pre) trying to model a 3D simple mantle
> flow with a 3D chunk geometry in spherical coordinates but when I run  my
> parameters file an error occurs.
> I attached the parameters file and a text file where I copied the error
> (Test_01_error.docx).
>
> do I need to modify or add some parameters?
>
> Thanks a lot!!!
>
>
> Elisa Fierro
>
> <Test_01_error.docx><Test_01.prm>_______________________________________________
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-- 
Timo Heister
http://www.math.clemson.edu/~heister/