[Pw_forum] Negative or zero norm error

[Donghee Lim]

Dear all

I wonder in which case the following error occurs. Could you please let 
me know how I can overcome that kind of error. My input option is as 
follows;

Thank you,
Donghee Lim

<Error message>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     from cgramg1_k : error #         1
     negative or zero norm in S
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

<Input option>
&CONTROL
                 calculation = 'relax' ,
                     tprnfor = .true. ,
/
&SYSTEM
                       ibrav = 8,
                   celldm(1) = 10.79865D0,
                   celldm(2) = 1.41421D0,
                   celldm(3) = 3.15706D0,
                         nat = 36,
                        ntyp = 3,
                     ecutwfc = 35.D0 ,
                     ecutrho = 350.D0 ,
                 occupations = 'smearing' ,
                     degauss = 0.01D0 ,
                    smearing = 'methfessel-paxton' ,
                       nspin = 2 ,     starting_magnetization(1) = 0.5D0,
/
&ELECTRONS
                    conv_thr = 1.D-6 ,
                 mixing_mode = 'local-TF',
                 mixing_beta = 0.3D0 ,
             diagonalization = 'david_overlap',
            diago_david_ndim = 8,
/
&IONS
                   bfgs_ndim = 3 ,
           pot_extrapolation = 'second_order' ,
           wfc_extrapolation = 'second_order' ,
/
ATOMIC_SPECIES
   Fe   55.8457  Fe.pbe-sp-van_ak.UPF   C    12.0107  C.pbe-van_ak.UPF
   Cl   35.4530  Cl.pbe-n-van.UPF