[aspect-devel] Particle related error when running on more than 1 node

[Eric Heien]

This means a particle fell out of the mesh and was lost - I haven't yet written code to put these particles back in the mesh.  It may be indicative of something non-physical about the simulation, but since it happens based on the number of cores it is more likely a bug I need to fix.  Can you send me the parameter file you're using?

If you want to ensure the run works anyway, you can try commenting out the call to check_particle_count() in tracer.cc.

-Eric

On Jun 23, 2012, at 2:53 AM, John Naliboff wrote:

> Hi all,
> 
> I came across an error that appears to be associated with tracking of particles across multiple nodes:
> 	Exception on MPI process <0> while running postprocessor <N6aspect11Postprocess11ParticleSetILi2EEE>: 
> 	-------------------------------------------------------- 
>        An error occurred in line <484> of file <source/postprocess/tracer.cc> in function 
> 	   void aspect::Postprocess::ParticleSet<dim>::check_particle_count() [with int dim = 2] 
>       The violated condition was: 
> 	   global_particles==global_sum_particles 
>       The name and call sequence of the exception was: 
>           ExcMessage ("Particle count changed.") Additional Information: Particle count changed. 
>       -------------------------------------------------------- 
>       Aborting!
> 
> I received this error when I tried to run a model on 32 threads across 2 nodes.  I am currently running the same model successfully on 16 threads across 1 node.  The attached file (bkb1Ra1e8.o6876) contains the full error output.  The error also generated a number of "core" files in the model directory.  I last updated aspect through svn update two weeks ago, but this is perhaps an issue specific to deal.ii?
> 
> Cheers,
> John
> 
> <bkb1Ra1e8.o6876>
> 
> 
> 
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