Dear all,<div><br></div><div>When I tried to do a scf calculation for a Cd6Se6(NH3)6 system with this input file:</div><div><div>... </div><div> prefix='Cd6Se6_6NH3'</div><div> /</div><div> &system</div><div>
ibrav = 1, celldm(1) =24.0, nat= 36, ntyp= 4,</div><div> ecutwfc = 25.0, ecutrho = 200.0</div><div> /</div><div> &electrons</div><div> diagonalization='david'</div><div> electron_maxstep = 50,</div>
<div> conv_thr = 1.0e-6</div><div> mixing_beta = 0.7</div><div> /</div><div>ATOMIC_SPECIES</div><div> Cd 112.40 Cd.pbe-n-van.UPF</div><div> Se 78.96 Se.pbe-van.UPF</div><div> N 14.00674 N.pbe-van_bm.UPF</div><div>
H 1.00794 H.pbe-van_bm.UPF</div><div>ATOMIC_POSITIONS { Angstrom }</div><div> Cd 2.335662 -0.652860 -1.245236</div><div> Se 0.716568 -2.822854 -1.607832</div><div> Cd -1.744362 -1.695189 -1.236658</div>
<div> Se -2.813270 0.793267 -1.589989</div><div> Cd -0.604088 2.359223 -1.226735</div><div> Se 2.084317 2.042734 -1.598912</div><div> Cd 1.743905 1.694974 1.235198</div><div> Se -0.716656 2.822664 1.606488</div>
<div> Cd -2.336652 0.652370 1.243401</div><div> Se -2.084941 -2.043265 1.597360</div><div> Cd 0.603464 -2.360008 1.224830</div><div> Se 2.812401 -0.793480 1.589509</div><div> N -3.297002 -3.210191 -2.268159</div>
<div> N 1.142941 -4.439357 2.305111</div><div> N -4.420213 1.256882 2.274861</div><div> N 3.297027 3.208308 2.268243</div><div> N 4.433771 -1.251357 -2.251640</div><div> N -1.142051 4.445355 -2.294325</div>
<div> H -1.974619 4.288210 -2.861996</div><div> H -1.316482 5.110528 -1.541044</div><div> H -0.336172 4.714041 -2.858666</div><div> H -4.254951 2.101743 2.821691</div><div> H -5.065279 1.424795 1.502699</div>
<div> H -4.719730 0.474392 2.856237</div><div> H -2.757672 -3.864131 -2.835206</div><div> H -3.771885 -3.679104 -1.496722</div><div> H -3.942383 -2.655039 -2.829719</div><div> H 1.976965 -4.276392 2.869023</div>
<div> H 0.338563 -4.702490 2.874197</div><div> H 1.315512 -5.112052 1.558141</div><div> H 3.938159 2.652630 2.834135</div><div> H 3.776822 3.673792 1.497784</div><div> H 2.757064 3.865287 2.831160</div>
<div> H 4.739488 -0.467945 -2.828494</div><div> H 5.065281 -1.414646 -1.467255</div><div> H 4.283188 -2.097776 -2.800224</div><div><br></div><div>K_POINTS Gamma</div><div><br></div><div>qe told me there is 'illegal instruction'. What is the problem? How to fix it?</div>
<div><br></div><div><br></div><div>Thanks,</div><div>Ruibin</div><div>Graduate student</div><div>Department of Chemistry</div><div>Duke University</div><br><br>
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