Dear all,
I am using the EPW package in conjunction with QE to calculate electron phonon
coefficients for systems. The "scf", "ph" and "nscf" run quite smoothly;
however when I execute the last step which is using the "epw.x" command I get
the error:
"Q(r) pseudized with 0 coefficients
EPW : 6.72s CPU time, 17.23s wall time
EPW : 14.08s CPU time, 28.02s wall time
EPW : 14.08s CPU time, 28.02s wall time
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
from setphases_wrap : error # 1 only one proc per pool
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
"The parallel execution is such that:
Program EPW v.2.3.5 starts ... Today is 12Nov2012 at 2:27:22
Parallel version (MPI)
Number of processors in use: 16 R & G space division: proc/pool
= 16"
However when I reduce the number to 8 processors (that is 1 node on the cluster
I am working on), I get another error from davcio:
"%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
from davcio : error # 20 error while reading from file
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"
Mind you that the previous scf , nscf and ph steps were done with 16
processors. Could that be the error? Would repeating everything with 8
processors work?
Thanks in advance
Elias ALbertUniiversity of DerbyDE12 4ERUK
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