[Pw_forum] about one "fatal error"

[stewart at cnf.cornell.edu]

Dear L. F. Huang, 

I don't think that this is a Quantum Espresso error.  It looks like your 
calculation was working well and then node 10 on your cluster failed or lost 
communication with the rest of the network.  Are you still able to log into 
node 10? 

Best regards, 

Derek
 


L.F.Huang writes: 

> Hello everyone:
>   I am calculating graphene supercell with one vacancy impurity, whose size
> is 4*4*1. It is an magnetic system whose magnetization is 0.8 bohr magneton.
> And there are 31 atoms and 93 representations with one mode for each. At
> first, ph.x is executing well, however, when the 23th representation is being
> done, there comes out some strange thing:
> **********************************************************************
> FATAL ERROR on MPI node 3 (ganode054): GM send to MPI node 10 (???
> [00:60:dd:49:08:2a]) failed: status 18 (target node was unreachable) check
> the target host, mapping or cables
> Small/Ctrl message completion error!
> forrtl: error (76): IOT trap signal
> FATAL ERROR on MPI node 9 (ganode057): GM send to MPI node 10 (???
> [00:60:dd:49:08:2a]) failed: status 18 (target node was unreachable) check
> the target host, mapping or cables
> Small/Ctrl message completion error!
> forrtl: error (76): IOT trap signal
> **********************************************************************
> AND:
> PWSCF version: QE3.2.3
> K_point grid: 10*10*1 with 52*2(the 2 is due to magneticity) reduced k_points
> Number of nodes: -np 8 
> 
> Does anyone knows what is the reason of this error? and How can I do to
> solve it?
> I would like appreciate any advice very much!!! 
> 
> Yours Sincerely
> Huang 
> 
> ======================================================================
> L.F.Huang(�����) lfhuang at theory.issp.ac.cn
> ======================================================================
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>       Instutue of Solid State Physics,the Chinese Academy of Sciences,
>       P.O.Box 1129, Hefei 230031, P.R.China
>  Tel: 86-551-5591464-328(office)
>  Fax: 86-551-5591434
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################################
Derek Stewart, Ph. D.
Scientific Computation Associate
http://www.people.cornell.edu/pages/das248/
250 Duffield Hall
Cornell Nanoscale Facility (CNF)
Ithaca, NY 14853
stewart (at) cnf.cornell.edu
(607) 255-2856