[QE-users] qe-6-4: fs.x is not generating the file "prefix"_fs.bxsf

[Pacome NGUIMEYA]

Dear Paolo,
thank you for your assistant.

Apart from the grid which was not uniform, there is something 
I was doing wrong. In fact, one of the reasons fs.x was not 
generating the .bxsf file was that I was running it in parallel. 
After several unsuccessful attempts, I thought about running it 
in series. When I ran it in series, it has generated that file.

However, this works with qe-6.1 but does not with qe-6.4.
The problem with qe-6.4 is not the fs.x program but the nscf
calculation which is not generating any output data. 
The nscf output file is empty, it only contains this:

Program PWSCF v.6.4 starts on  1Apr2019 at  4:51:52 

     This program is part of the open-source Quantum ESPRESSO suite
     for quantum simulation of materials; please cite
         "P. Giannozzi et al., J. Phys.:Condens. Matter 21 395502
(2009);
         "P. Giannozzi et al., J. Phys.:Condens. Matter 29 465901
(2017);
          URL http://www.quantum-espresso.org", 
     in publications or presentations arising from this work. More
details at
     http://www.quantum-espresso.org/quote

     Parallel version (MPI), running on    24 processors

     MPI processes distributed on     1 nodes
     R & G space division:  proc/nbgrp/npool/nimage =      24
     Waiting for input...
     Reading input from standard input

     Current dimensions of program PWSCF are:
     Max number of different atomic species (ntypx) = 10
     Max number of k-points (npk) =  40000
     Max angular momentum in pseudopotentials (lmaxx) =  3
     Message from routine input:
     WARNING: "startingwfc" set to atomic+random may spoil restart

     Atomic positions and unit cell read from directory:
     ~/TaAs.save/ 


I ran the nscf calculation several times (in parallel, in series) but I
always got the same empty output file.

Very strange!!!

I used 9 9 9 0 0 0 for the scf calculation and 27 27 27 0 0 0 (with
occupations='tetrahedra') for the nscf calculation.

Regards
Pacome