[aspect-devel] Some problems with ASPECT

[Timo Heister]

I just noticed that your crash doesn't appear on my machine. Maybe
this is the bug we fixed in
https://github.com/geodynamics/aspect/pull/790 which requires a new
deal.II and Trilinos version.

But I am getting a different error with your example, that should be
fixed soon: https://github.com/geodynamics/aspect/pull/904


On Thu, Jun 2, 2016 at 12:30 PM, Timo Heister <heister at clemson.edu> wrote:
> 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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>>
>>
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>
>
> --
> Timo Heister
> http://www.math.clemson.edu/~heister/



-- 
Timo Heister
http://www.math.clemson.edu/~heister/