<div dir="ltr"><div dir="ltr">Dear Quantum Espresso Users and Developers,<br>
<br>
I'm using simple.x to get the dielectric function for a gold-Aluminium<br>
alloy. With pure systems (Au and Al), I had no problems at all. For the<br>
alloy, the supercell has 12 atoms and the calculation ran with the<br>
parameters similar to the ones in the example. However, I got an<br>
anisotropic response. I already evaluate such a structure using epsilon,<br>
and it returned isotropic dielectric function as expected for a cubic<br>
lattice (I had to use as many k-point as I could do the calculation - for a<br>
coarse grid, epsilon.x returned anisotropic response too).<br>
<br>
Therefore, I increased the k-point (from 20 20 20 to 30 30 30, and to 40 40<br>
40) in the simple.x and simple_ip.x calculations, and I failed. Simple.x<br>
finished the calculations with no errors (at least no error messages). The<br>
simple_IP, however, was abruptly finished by the MPI manager with the<br>
following message:<br>
k-point block: 1093<br>
<br>
===================================================================================<br>
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES<br>
= PID 13719 RUNNING AT quantum01= EXIT CODE: 9<br>
= CLEANING UP REMAINING PROCESSES<br>
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES<br>
===================================================================================<br>
Intel(R) MPI Library troubleshooting guide:<br>
<a href="https://software.intel.com/node/561764" rel="noreferrer" target="_blank">https://software.intel.com/node/561764</a><br>
===================================================================================<br>
After a kick search, I've found that such kind of error occurs when some<br>
an exception like division by zero happens. I've tried to tweak the<br>
parameters, the number of bands (I increased the number of bands, I used<br>
the same number of bands as the KS-states, I tried to use the non-local<br>
commutator, I increased the parameter s, and also decreased it). Hence, I<br>
had no success.<br>
<br>
Do you have any hint? Any workaround?<br>
<br>
Thanks a lot for your help!!<br>
<br>
Best!<br>
<br>
Anibal Bezerra<br>
The Federal University of Alfenas<br>
Alfenas<br>
Brazil</div></div>