[Pw_forum] about one "fatal error"

[Paolo Giannozzi]

On Aug 26, 2008, at 4:03 , L.F.Huang wrote:

>   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
> [...]
> Does anyone knows what is the reason of this error?

of course, nobody knows, but somebody might argue that it looks like a
problem in node 10 rather than in q-e. Any evidence that the problem is
really on the q-e side (i.e. the problem, or some problem, is  
reproducible
on a different machine)?

Paolo
---
Paolo Giannozzi, Dept of Physics, University of Udine
via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222