Hello:

Upon restarting a turbo_eels.x calculation, I noted that the value of z1 was oscillating between 1+0i and NaN + NaNi, while alpha,beta,gamma = 0,NaN,0 for all iterations after the first.

In the first iteration after restarting, alpha = 0, beta=  gamma = 31.15 ~= ecutwfc/2, and z1=1+0i

my pw.x input in

&CONTROL
  calculation = 'scf'
  prefix='d100',
  pseudo_dir = '../../pseudo/',
  nstep =  55,
  etot_conv_thr = 1.0E-7,
  outdir='d100/'
 /
 &SYSTEM
    ibrav=  2
    celldm(1) = 9.71187
    nat= 2
    ntyp= 2
    nbnd = 8
    occupations  =  'fixed',
    ecutwfc=60.0,
    ecutrho=400.0,
 /
 &ELECTRONS
    diagonalization='david'
    mixing_mode = 'plain'
    mixing_beta = 0.7
    conv_thr =  1.0d-12
 /
ATOMIC_SPECIES
  Li  6.941  Li.pbe-s-rrkjus_psl.0.2.1.UPF
  Cl  35.453 Cl.pbe-n-rrkjus_psl.0.1.UPF
ATOMIC_POSITIONS alat
  Li 0.5 0.5 0.5
  Cl 0.0 0.0 0.0
K_POINTS automatic
  8 8 8 1 1 1

and my turbo_eels.x input is

&lr_input
  prefix = 'd100',
  outdir='d100/',
  restart_step=250,
  restart=.true.
/
&lr_control
  itermax=1000
  q1=3.25626
  q2=0
  q3=3.25626
/u

let me know if you need any other diagnostic information. I am running qe-6.3MaX on 60 cpus on a system employing SLURM.

Levi Keller
Helsinki University

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