[QE-users] problems computing cholesky

Riemann Derakhshan riemann.derakhshan at gmail.com
Mon Apr 5 09:57:02 CEST 2021


Dear PWSCF Community,

Hope you are fine.

Through the vc-relax calculations for the Pb slab, after some iterations
I'm getting the below error:

     Error in routine  cdiaghg (95):
      problems computing cholesky

I will highly appreciate it if you share your ideas with me about what
causes this error and how it can be fixed.

Herewith I've attached my input file and relevant part of the output file
for your consideration.

Regards,
Vahid

================ INPUT ==================================================
 &CONTROL
                 calculation = 'vc-relax' ,
                restart_mode = 'from_scratch' ,
                  wf_collect = .true. ,
                      outdir = './' ,
                  pseudo_dir = '${HOME}/Pseudo' ,
                      prefix = 'Pb' ,
                     disk_io = 'low' ,
                   verbosity = 'high' ,
 /
 &SYSTEM
                       ibrav = 0,
                   celldm(1) = 9.5770828664d0,
                         nat = 10,
                        ntyp = 1,
                     ecutwfc = 350 ,
                 occupations = 'smearing' ,
                     degauss = 0.005d0 ,
                    smearing = 'marzari-vanderbilt' ,
 /
 &ELECTRONS
                    conv_thr = 1d-06 ,
                 mixing_beta = 0.3d0 ,
 /
 &IONS
                ion_dynamics = 'bfgs' ,
 /
 &CELL
               cell_dynamics = 'bfgs' ,
                 cell_dofree = 'xyz' ,
 /
CELL_PARAMETERS alat
     0.707106781   -0.707106781    0.000000000
     0.707106781    0.707106781    0.000000000
     0.000000000    0.000000000    8.419525238
ATOMIC_SPECIES
   Pb  207.20000  Pb_PBE.upf
ATOMIC_POSITIONS crystal
   Pb      0.000000000    0.000000000    0.410921343
   Pb      0.500000000    0.500000000    0.410921343
   Pb      0.500000000   -0.000000000    0.470307114
   Pb      1.000000000    0.500000000    0.470307114
   Pb      0.000000000    0.000000000    0.529692886
   Pb      0.500000000    0.500000000    0.529692886
   Pb      0.500000000    0.000000000    0.589078657
   Pb      0.000000000    0.500000000    0.589078657
   Pb      0.000000000    0.000000000    0.648464428
   Pb      0.500000000    0.500000000    0.648464428
K_POINTS automatic
  12 12 1   0 0 0

================ OUTPUT =================================================

    Total force =     0.030286     Total SCF correction =     0.001308


     Computing stress (Cartesian axis) and pressure

          total   stress  (Ry/bohr**3)                   (kbar)     P=
  -5.93
  -0.00004600   0.00000000   0.00000000           -6.77        0.00
 0.00
  -0.00000000  -0.00004600   0.00000000           -0.00       -6.77
 0.00
   0.00000000   0.00000000  -0.00002896            0.00        0.00
-4.26

     kinetic stress (kbar)   9163.73     -0.00      0.00
                               -0.00   9163.73      0.00
                                0.00      0.00   9164.69

     local   stress (kbar)-359922.74     -0.00     -0.00
                               -0.00-359922.74      0.00
                               -0.00      0.00 362267.51

     nonloc. stress (kbar)  -4413.05      0.00      0.00
                                0.00  -4413.05      0.00
                                0.00      0.00  -4416.09

     hartree stress (kbar) 181406.68      0.00      0.00
                                0.00 181406.68     -0.00
                                0.00     -0.00-177773.50

     exc-cor stress (kbar)   3339.47      0.00     -0.00
                                0.00   3339.47     -0.00
                               -0.00     -0.00   3338.34

     corecor stress (kbar)  -4931.22     -0.00      0.00
                               -0.00  -4931.22      0.00
                                0.00      0.00  -4931.14

     ewald   stress (kbar) 175350.37     -0.00      0.00
                               -0.00 175350.37      0.00
                                0.00      0.00-187654.08

     hubbard stress (kbar)      0.00      0.00      0.00
                                0.00      0.00      0.00
                                0.00      0.00      0.00

     london  stress (kbar)      0.00      0.00      0.00
                                0.00      0.00      0.00
                                0.00      0.00      0.00

     DFT-D3  stress (kbar)      0.00      0.00      0.00
                                0.00      0.00      0.00
                                0.00      0.00      0.00

     XDM     stress (kbar)      0.00      0.00      0.00
                                0.00      0.00      0.00
                                0.00      0.00      0.00

     dft-nl  stress (kbar)      0.00      0.00      0.00
                                0.00      0.00      0.00
                                0.00      0.00      0.00

     TS-vdW  stress (kbar)      0.00      0.00      0.00
                                0.00      0.00      0.00
                                0.00      0.00      0.00



     number of scf cycles    =   3
     number of bfgs steps    =   2

     enthalpy old            =   -1404.1369323220 Ry
     enthalpy new            =   -1404.1396592796 Ry

     CASE: enthalpy_new < enthalpy_old

     new trust radius        =       0.0345760219 bohr
     new conv_thr            =       0.0000001090 Ry

     new unit-cell volume =   7321.96851 a.u.^3 (  1085.00378 Ang^3 )
     density =      3.17108 g/cm^3

CELL_PARAMETERS (alat=  9.57708287)
   0.702858310  -0.707106781   0.000000000
   0.707106781   0.702858310   0.000000000
   0.000000000   0.000000000   8.385663933

ATOMIC_POSITIONS (crystal)
Pb            0.0000000000        0.0000000000        0.4116796836
Pb            0.5000000000        0.5000000000        0.4116796677
Pb            0.5000000000       -0.0000000000        0.4695686463
Pb            1.0000000000        0.5000000000        0.4695686463
Pb            0.0000000000        0.0000000000        0.5296894606
Pb            0.5000000000        0.5000000000        0.5296894615
Pb            0.5000000000       -0.0000000000        0.5898160423
Pb            0.0000000000        0.5000000000        0.5898160423
Pb            0.0000000000        0.0000000000        0.6477105834
Pb            0.5000000000        0.5000000000        0.6477106219



     Writing output data file ./Pb.save/
     NEW-OLD atomic charge density approx. for the potential

     negative rho (up, down):  4.239E-06 0.000E+00
     extrapolated charge  139.33910, renormalised to  140.00000

     total cpu time spent up to now is     5450.5 secs

     Self-consistent Calculation

     iteration #  1     ecut=   350.00 Ry     beta= 0.30
     Davidson diagonalization with overlap
     ethr =  1.00E-06,  avg # of iterations = 12.0

     negative rho (up, down):  2.981E-06 0.000E+00

     total cpu time spent up to now is     5718.7 secs

     total energy              =   -1399.22364359 Ry
     Harris-Foulkes estimate   =   -1491.08426468 Ry
     estimated scf accuracy    <       8.73203731 Ry

     iteration #  2     ecut=   350.00 Ry     beta= 0.30
     Davidson diagonalization with overlap

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     Error in routine  cdiaghg (95):
      problems computing cholesky
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

     stopping ...

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     Error in routine  cdiaghg (95):
      problems computing cholesky
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

     stopping ...

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     Error in routine  cdiaghg (95):
      problems computing cholesky
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

--

*Dr. Vahid Derakhshan Maman*


Postdoctoral Research Associate
Utrecht University, Debye Institute for Nanomaterials Science
Heidelberglaan 83584 CS Utrecht
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