Re: [ESPResSo-users] activate magnetostatics method DipolarDirectSumCpu

[Jean-Noël Grad]

Dear Ricky,

Apparently the code for the DipolarDirectSumCpu class calls a function 
that throws an error if more than 1 thread is used. Unfortunately this 
is not mentioned in the documentation. I'm not too familiar with 
magnetostatics methods, maybe someone more knowledgeable can advise you 
on MPI-enabled alternatives in Espresso.

Concerning the prefactor issue, I was able to reproduce it. This is 
quite surprising, accessing the prefactor attribute before adding the 
dipolar class to the list of actors resets it to zero.

I've opened two issues on our tracker, you can check the progress there:
https://github.com/espressomd/espresso/issues/2827
https://github.com/espressomd/espresso/issues/2828

Thanks for reporting these issues to us.
Best,
JN

On 5/10/19 3:05 PM, address@hidden wrote:
> Dear all,
>
> I think the DipolarDirectSumCpu is a long range interaction and the 
> command of mpi version will divide the whole box into local boxes so 
> that each node sees everything on its own local box and on one layer of 
> cells. Due to that, the DipolarDirectSumCpu can't work fine! Is that why 
> I could not activate magnetostatics method DipolarDirectSumCpu with the 
> command of mpi version? If it's true, how can I calculate the dipolar 
> interaction with open boundary?
>
> Thanks!
> Regards!
>
> Ricky
>
> ------------------------------------------------------------------------
> address@hidden