<DIV>Dear all,</DIV>
<DIV> </DIV>
<DIV>When I perform a test on Mg bulk. I met the following problems,</DIV>
<DIV> </DIV>
<DIV>1. Symmetry operation is not allowed.</DIV>
<DIV> warning: symmetry operation # 2 not allowed. fractional translation:<BR> -0.3333333 0.3333333 -0.5000000 in crystal coordinates<BR> warning: symmetry operation # 4 not allowed. fractional translation:<BR> -0.3333334 0.3333333 0.5000000 in crystal coordinates<BR> ..........</DIV>
<DIV>2. Convergence problem of eigenvectors. The energy seems okay!</DIV>
<DIV> iteration # 6 ecut= 40.00 ryd beta=0.50<BR> Davidson diagonalization (with overlap)<BR> WARNING: 1 eigenvalues not converged<BR> warning : 1 eigenvectors not converged after 1 attemps<BR> ethr = 4.45E-08, avg # of iterations = 6.5</DIV>
<DIV> total energy = -12.70531131 ryd<BR> estimated scf accuracy < 0.00000049 ryd</DIV>
<DIV> </DIV>
<DIV>Can anyone tell me how to resolve this problem? I also attach the input file. I do appreciate your help on checking my input file.</DIV>
<DIV> </DIV>
<DIV> &control<BR> calculation='scf',<BR> restart_mode='from_scratch',<BR> pseudo_dir='./',<BR> outdir='./scratch/',<BR> prefix='mg',<BR> tprnfor=.true., tstress=.true.,<BR> iprint=100,<BR> ltaucry=.true.,<BR> verbosity='high',<BR>/<BR>&system<BR> ibrav=4, celldm(1)=6.064889441529015811344786338, celldm(3)=1.62351218296254751666,<BR> nat=2, ntyp=1, nbnd=4,<BR> nspin=1,<BR> ecutwfc=40.0,<BR> occupations='smearing', smearing='methfessel-paxton', degauss=0.05,<BR>/<BR>&electrons<BR> conv_thr=1.0e-08,<BR> mixing_mode='plain', mixing_beta=0.5,<BR> diagonalization='david',<BR> startingpot='atomic',
startingwfc='atomic',<BR>/<BR>ATOMIC_SPECIES<BR> Mg 24.30 mg_blyp</DIV>
<DIV>ATOMIC_POSITIONS CRYSTAL<BR>Mg 0.0000000 0.0000000 0.000000<BR>Mg 0.3333333 0.6666667 0.500000<BR>K_POINTS AUTOMATIC<BR>10 10 10 1 1 1</DIV>
<DIV> </DIV>
<DIV>Many thanks in advance!</DIV>
<DIV>Regards,</DIV>
<DIV>Adrain<BR></DIV>
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