Dear all,<br>sorry for disturbing but I cannot find a solution in the mailing list.<br>I'm trying to use neb.x to simulate the diffusion of a F vacancy in a LiF crystal. The run calculates well the first two images and then exit at the third with the error:<br>
<br>Error in routine set_sym_bl (1):<br> Symmetry group not a group! Use standard orientations for axis<br><br>How can I fix this problem?<br>My input is reported below.<br><br>Thanks a lot and best regards,<br>Mauro Sgroi.<br>
Centro Ricerche FIAT<br><br><br>BEGIN<br>BEGIN_PATH_INPUT<br>&PATH<br> restart_mode = 'from_scratch'<br> string_method = 'neb',<br> nstep_path = 200,<br> ds = 1.D0,<br>
opt_scheme = "broyden2",<br> num_of_images = 9,<br> k_max = 0.3D0,<br> k_min = 0.2D0,<br> CI_scheme = "no-CI",<br> path_thr = 0.1D0,<br>/<br>END_PATH_INPUT<br>
BEGIN_ENGINE_INPUT<br>&CONTROL<br> pseudo_dir='/usr2/sgroi/DATABASE/ESPRESSO',<br> prefix='lif',<br> outdir='./data',<br> wf_collect=.false.,<br> disk_io='none',<br>/<br>
&SYSTEM<br> ibrav=0,<br> celldm(1)=15.393<br> nat=63,<br> ntyp=2,<br> ecutwfc=30,<br> ecutrho=360,<br> nbnd=160,<br> tot_charge=+1,<br> occupations='smearing',<br> degauss=0.01<br>
/<br>&ELECTRONS<br> conv_thr=1.0d-8,<br> mixing_beta=0.7,<br> electron_maxstep=250<br>/<br><br>ATOMIC_SPECIES<br> Li 6.941 Li.pbe-s-van_ak.UPF<br> F 18.99843 F.pbe-n-van.UPF<br><br>BEGIN_POSITIONS<br>FIRST_IMAGE<br>
ATOMIC_POSITIONS { alat } <br>Li 0.0 0.0 0.0 0 0 0 <br>Li 0.0 0.0 0.50 0 0 0<br>Li 0.0 0.50 0.0 0 0 0<br>Li 0.0 0.50 0.50 1 1 1 <br>Li 0.50 0.0 0.0 0 0 0<br>
Li 0.50 0.0 0.50 1 1 1 <br>Li 0.50 0.50 0.0 0 0 0 <br>Li 0.50 0.50 0.50 1 1 1 <br>Li 0.0 0.25 0.25 0 0 0 <br>Li 0.0 0.25 0.75 0 0 0 <br>Li 0.0 0.75 0.25 1 1 1<br>
Li 0.0 0.75 0.75 1 1 1<br>Li 0.50 0.25 0.25 1 1 1 <br>Li 0.50 0.25 0.75 1 1 1 <br>Li 0.50 0.75 0.25 0 0 0 <br>Li 0.50 0.75 0.75 0 0 0 <br>Li 0.25 0.0 0.25 0 0 0 <br>
Li 0.25 0.0 0.75 0 0 0 <br>Li 0.25 0.50 0.25 1 1 1 <br>Li 0.25 0.50 0.75 1 1 1 <br>Li 0.75 0.0 0.25 1 1 1<br>Li 0.75 0.0 0.75 1 1 1<br>Li 0.75 0.50 0.25 0 0 0 <br>
Li 0.75 0.50 0.75 0 0 0 <br>Li 0.25 0.25 0.0 0 0 0 <br>Li 0.25 0.25 0.50 1 1 1<br>Li 0.25 0.75 0.0 0 0 0 <br>Li 0.25 0.75 0.50 1 1 1<br>Li 0.75 0.25 0.0 0 0 0 <br>
Li 0.75 0.25 0.50 1 1 1<br>Li 0.75 0.75 0.0 0 0 0 <br>Li 0.75 0.75 0.50 0 0 0 <br>F 0.25 0.25 0.25 1 1 1 <br>F 0.25 0.25 0.75 1 1 1 <br>F 0.25 0.75 0.25 1 1 1 <br>
F 0.25 0.75 0.75 1 1 1<br>F 0.75 0.25 0.25 1 1 1 <br>F 0.75 0.25 0.75 1 1 1 <br>F 0.75 0.75 0.25 0 0 0 <br>F 0.75 0.75 0.75 0 0 0 <br>F 0.25 0.50 0.0 0 0 0<br>
F 0.25 0.0 0.50 0 0 0<br>F 0.25 0.0 0.0 0 0 0<br>F 0.75 0.50 0.50 0 0 0 <br>F 0.75 0.50 0.0 0 0 0<br>F 0.75 0.0 0.50 1 1 1<br>F 0.75 0.0 0.0 0 0 0<br>
F 0.50 0.25 0.50 0 0 0 <br>F 0.50 0.25 0.0 0 0 0<br>F 0.50 0.75 0.50 0 0 0 <br>F 0.50 0.75 0.0 0 0 0<br>F 0.0 0.25 0.50 0 0 0<br>F 0.0 0.25 0.0 0 0 0<br>
F 0.0 0.75 0.50 1 1 1 <br>F 0.0 0.75 0.0 0 0 0<br>F 0.50 0.50 0.25 1 1 1 <br>F 0.50 0.50 0.75 1 1 1 <br>F 0.50 0.0 0.25 1 1 1 <br>F 0.50 0.0 0.75 1 1 1 <br>
F 0.0 0.50 0.25 1 1 1 <br>F 0.0 0.50 0.75 1 1 1 <br>F 0.0 0.0 0.25 0 0 0<br>F 0.0 0.0 0.75 0 0 0<br><br>LAST_IMAGE<br>ATOMIC_POSITIONS { alat }<br>Li 0.0 0.0 0.0 0 0 0 <br>
Li 0.0 0.0 0.50 0 0 0<br>Li 0.0 0.50 0.0 0 0 0<br>Li 0.0 0.50 0.50 1 1 1 <br>Li 0.50 0.0 0.0 0 0 0<br>Li 0.50 0.0 0.50 1 1 1 <br>Li 0.50 0.50 0.0 0 0 0 <br>
Li 0.50 0.50 0.50 1 1 1 <br>Li 0.0 0.25 0.25 0 0 0 <br>Li 0.0 0.25 0.75 0 0 0 <br>Li 0.0 0.75 0.25 1 1 1<br>Li 0.0 0.75 0.75 1 1 1<br>Li 0.50 0.25 0.25 1 1 1 <br>
Li 0.50 0.25 0.75 1 1 1 <br>Li 0.50 0.75 0.25 0 0 0 <br>Li 0.50 0.75 0.75 0 0 0 <br>Li 0.25 0.0 0.25 0 0 0 <br>Li 0.25 0.0 0.75 0 0 0 <br>Li 0.25 0.50 0.25 1 1 1 <br>
Li 0.25 0.50 0.75 1 1 1 <br>Li 0.75 0.0 0.25 1 1 1<br>Li 0.75 0.0 0.75 1 1 1<br>Li 0.75 0.50 0.25 0 0 0 <br>Li 0.75 0.50 0.75 0 0 0 <br>Li 0.25 0.25 0.0 0 0 0 <br>
Li 0.25 0.25 0.50 1 1 1<br>Li 0.25 0.75 0.0 0 0 0 <br>Li 0.25 0.75 0.50 1 1 1<br>Li 0.75 0.25 0.0 0 0 0 <br>Li 0.75 0.25 0.50 1 1 1<br>Li 0.75 0.75 0.0 0 0 0 <br>
Li 0.75 0.75 0.50 0 0 0 <br>F 0.25 0.25 0.25 1 1 1 <br>F 0.25 0.25 0.75 1 1 1 <br>F 0.25 0.75 0.25 1 1 1 <br>F 0.25 0.75 0.75 1 1 1<br>F 0.75 0.25 0.25 1 1 1 <br>
F 0.75 0.25 0.75 1 1 1 <br>F 0.75 0.75 0.25 0 0 0 <br>F 0.75 0.75 0.75 0 0 0 <br>F 0.25 0.50 0.0 0 0 0<br>F 0.25 0.0 0.50 0 0 0<br>F 0.25 0.0 0.0 0 0 0<br>
F 0.75 0.50 0.50 0 0 0 <br>F 0.75 0.50 0.0 0 0 0<br>F 0.75 0.0 0.50 1 1 1<br>F 0.75 0.0 0.0 0 0 0<br>F 0.25 0.5 0.50 0 0 0 <br>F 0.50 0.25 0.0 0 0 0<br>
F 0.50 0.75 0.50 0 0 0 <br>F 0.50 0.75 0.0 0 0 0<br>F 0.0 0.25 0.50 0 0 0<br>F 0.0 0.25 0.0 0 0 0<br>F 0.0 0.75 0.50 1 1 1 <br>F 0.0 0.75 0.0 0 0 0<br>
F 0.50 0.50 0.25 1 1 1 <br>F 0.50 0.50 0.75 1 1 1 <br>F 0.50 0.0 0.25 1 1 1 <br>F 0.50 0.0 0.75 1 1 1 <br>F 0.0 0.50 0.25 1 1 1 <br>F 0.0 0.50 0.75 1 1 1 <br>
F 0.0 0.0 0.25 0 0 0<br>F 0.0 0.0 0.75 0 0 0<br><br>END_POSITIONS<br><br>K_POINTS {gamma}<br><br>CELL_PARAMETERS {alat}<br>1 0 0<br>0 1 0<br>0 0 1<br><br>END_ENGINE_INPUT<br><br>END<br>
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