As a rule, if pp.x yields an error or strange results, run it on a single processor to rule out the possibility that parallelism does not owrk as expected (it should but there are so many different cases and it is hard to keep track of all of them)

Paolo

On 6/11/25 04:50, jibiaoli wrote:
Dear All

I try to run the local density of electronic entropy using pp.x (qe-7.4.1), but found the following error:

       Using Slab Decomposition
      negative rho (up, down):  3.830E-03 0.000E+00
      Calling punch_plot, plot_num =   4
forrtl: severe (174): SIGSEGV, segmentation fault occurred

Can anyone tell me how should I resovle this issue?

Jibiao Li

Sichuan University of Arts and Science


  &INPUTPP
    prefix          = 'brs'
    outdir          = './'
    filplot         = 'brs_test'
    plot_num        = 4
  /
  &PLOT
    nfile           = 1
    weight(1)       = 1.0
    fileout         = 'brs_test.xsf'
    iflag           = 2
    output_format   = 3
    e1(1)           = 1
    e1(2)           = 0
    e1(3)           = 0
    e2(1)           = 0
    e2(2)           = 0
    e2(3)           = 1
    x0(1)           = 0
    x0(2)           = 0.5
    x0(3)           = 0.3
    nx              = 64
    ny              = 64
  /

&CONTROL
                 calculation = 'scf' ,
                 restart_mode = 'from_scratch' ,
                       outdir = './' ,
                   pseudo_dir = '/home/jibiaoli/pseudo/PAW' ,
                       prefix = 'brs' ,
     wf_collect = .true.,
  /
  &SYSTEM
                        ibrav = 6,
                    celldm(1) = 19.353448,
                    celldm(3) = 2.7,
                          nat = 48,
                         ntyp = 3,
                      ecutwfc = 49 ,
                      ecutrho = 411 ,
    occupations = 'smearing' ,
                      degauss = 0.02D0 ,
                     smearing = 'fermi-dirac' ,
                    input_dft = 'SLA+PW+GGX',
/
  &ELECTRONS
             electron_maxstep = 299,
                  mixing_beta = 0.2D0 ,
              diagonalization = 'david' ,
  /
  &IONS
  /
ATOMIC_SPECIES
     O   15.999  O.pbe-n-kjpaw_psl.1.0.0.UPF
     H   2.014   H.pbe-kjpaw_psl.1.0.0.UPF
    Li   6.94   Li.pbe-sl-kjpaw_psl.1.0.0.UPF
ATOMIC_POSITIONS angstrom
H             3.8052535133        5.1207000000        9.1980936349
O             3.8537751212        5.1207000000        8.2127512683
H             4.8462767244        5.1207000000        7.9644058028
Li            0.0032721402        0.0000000000        6.8888906161
Li           -0.0690890140        3.4106266009        6.8476095661
Li           -0.0690890140        6.8307733991        6.8476095661
Li            3.3668756406        0.0000000000        6.9459025363
Li            3.2822140505        3.5190219987        7.1262190910
Li            3.2822140505        6.7223780013        7.1262190910
Li            6.8669585740        0.0000000000        6.8963094811
Li            6.8971527144        3.4459982488        6.9004446864
Li            6.8971527144        6.7954017512        6.9004446864
Li            1.7402170116        1.7539253584        5.1493614000
Li            1.6605974658        5.1207000000        5.0491827165
Li            1.7402170116        8.4874746416        5.1493614000
Li            5.0759064620        1.7382536385        5.1826006946
Li            5.1521242069        5.1207000000        5.1022832332
Li            5.0759064620        8.5031463615        5.1826006946
Li            8.5201277536        1.6965637424        5.0788954924
Li            8.5217954899        5.1207000000        5.0753199646
Li            8.5201277536        8.5448362576        5.0788954924
Li            0.0000000000        0.0000000000        3.4138000000 0   0   0 Li            0.0000000000        3.4138000000        3.4138000000 0   0   0 Li            0.0000000000        6.8276000000        3.4138000000 0   0   0 Li            3.4138000000        0.0000000000        3.4138000000 0   0   0 Li            3.4138000000        3.4138000000        3.4138000000 0   0   0 Li            3.4138000000        6.8276000000        3.4138000000 0   0   0 Li            6.8276000000        0.0000000000        3.4138000000 0   0   0 Li            6.8276000000        3.4138000000        3.4138000000 0   0   0 Li            6.8276000000        6.8276000000        3.4138000000 0   0   0 Li            1.7069000000        1.7069000000        1.7069000000 0   0   0 Li            1.7069000000        5.1207000000        1.7069000000 0   0   0 Li            1.7069000000        8.5345000000        1.7069000000 0   0   0 Li            5.1207000000        1.7069000000        1.7069000000 0   0   0 Li            5.1207000000        5.1207000000        1.7069000000 0   0   0 Li            5.1207000000        8.5345000000        1.7069000000 0   0   0 Li            8.5345000000        1.7069000000        1.7069000000 0   0   0 Li            8.5345000000        5.1207000000        1.7069000000 0   0   0 Li            8.5345000000        8.5345000000        1.7069000000 0   0   0 Li            0.0000000000        0.0000000000        0.0000000000 0   0   0 Li            0.0000000000        3.4138000000        0.0000000000 0   0   0 Li            0.0000000000        6.8276000000        0.0000000000 0   0   0 Li            3.4138000000        0.0000000000        0.0000000000 0   0   0 Li            3.4138000000        3.4138000000        0.0000000000 0   0   0 Li            3.4138000000        6.8276000000        0.0000000000 0   0   0 Li            6.8276000000        0.0000000000        0.0000000000 0   0   0 Li            6.8276000000        3.4138000000        0.0000000000 0   0   0 Li            6.8276000000        6.8276000000        0.0000000000 0   0   0
K_POINTS automatic
   4 4 1   0 0 0







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_______________________________________________________________________________
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worldwide who are victims of terrorism, military aggression, and indiscriminate 
warfare.
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