<div dir="ltr">Thank you sir.we will inform if anything same happens.<div><br></div><div>With Regards</div><div>Nipesh Dulal</div><div>Tribhuwan, university </div><div>Kathmandu, Nepal</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 3, 2017 at 1:08 PM, Lorenzo Paulatto <span dir="ltr"><<a href="mailto:lorenzo.paulatto@impmc.upmc.fr" target="_blank">lorenzo.paulatto@impmc.upmc.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">WHen using ultrasoft pseudopotentials (as you do), this error may<br>
indicate that the atoms got much closer to each other than they should.<br>
You can try to check the last relaxed positions with xcrysden or, put<br>
them back in an input file and use dist.x, to verify that nothing is<br>
suspect.<br>
<br>
hth<br>
<div><div class="h5"><br>
On 03/07/17 06:05, nipesh dulal wrote:<br>
> Dear QE experts<br>
><br>
> i am doing adsorption of bromine in 3*3 graphene sheet. But there comes<br>
> an error after one scf cycle which is mentioned below,<br>
><br>
><br>
><br>
> Writing output data file bromine_relax_pb.save<br>
> NEW-OLD atomic charge density approx. for the potential<br>
><br>
> negative rho (up, down): 1.894E-04 0.000E+00<br>
><br>
> total cpu time spent up to now is 3015.2 secs<br>
><br>
> per-process dynamical memory: 765.2 Mb<br>
><br>
> Self-consistent Calculation<br>
><br>
> iteration # 1 ecut= 45.00 Ry beta=0.60<br>
> Davidson diagonalization with overlap<br>
><br>
><br>
> Error in routine cdiaghg (332):<br>
> S matrix not positive definite<br>
><br>
><br>
> stopping ...<br>
><br>
> Here is the input file i have used<br>
><br>
> &control<br>
> calculation='relax'<br>
> restart_mode='from_scratch'<br>
> prefix='bromine_relax_pb'<br>
> outdir='/home/physics/<wbr>Downloads/graphene/bromine',<br>
> pseudo_dir = '/home/physics/Downloads/<wbr>graphene/pseudopotentials',<br>
> tstress=.true.<br>
> tprnfor=.true.<br>
> verbosity='high'<br>
> forc_conv_thr=1.0d-3<br>
> etot_conv_thr=1.0d-4<br>
> /<br>
> &SYSTEM<br>
> ibrav=4<br>
> celldm(1)=13.95<br>
> celldm(3)=2.71<br>
> nat=20<br>
> ntyp=2<br>
> ecutwfc=45.0<br>
> ecutrho=450<br>
> occupations='smearing'<br>
> smearing='mv'<br>
> degauss=0.002<br>
> vdw_corr='dft-d'<br>
> /<br>
> &ELECTRONS<br>
> diagonalization='david'<br>
> mixing_mode='plain'<br>
> electron_maxstep = 100<br>
> mixing_beta=0.6<br>
> conv_thr = 1.0D-8<br>
> /<br>
> &IONS<br>
> ion_dynamics='bfgs'<br>
> /<br>
><br>
> ATOMIC_SPECIES<br>
> C 12.011 C.pbe-rrkjus.UPF<br>
> Br 79.90 Br.pbe-n-rrkjus_psl.0.2.UPF<br>
> ATOMIC_POSITIONS (angstrom)<br>
> C 0.001428319 -0.002221684 0.000000000<br>
> C 1.231420386 0.708643125 0.000000000<br>
> C 2.462100004 -0.002217662 0.000000000<br>
> C 3.692093444 0.708644819 0.000000000<br>
> C -1.228907612 2.128792409 0.000000000<br>
> C 0.001083491 2.839646136 0.000000000<br>
> C 1.231766190 2.128786536 0.000000000<br>
> C 2.461756350 2.839644042 0.000000000<br>
> C 4.922778865 -0.002223457 0.000000000<br>
> C 6.152768802 0.708640258 0.000000000<br>
> C 3.692440675 2.128788864 0.000000000<br>
> C 4.922431282 2.839647087 0.000000000<br>
> C -2.459244768 4.259790447 0.000000000<br>
> C -1.229251320 4.970648411 0.000000000<br>
> C 0.001427750 4.259792429 0.000000000<br>
> C 1.231421212 4.970653053 0.000000000<br>
> C 2.462102410 4.259795383 0.000000000<br>
> C 3.692093014 4.970654542 0.000000000<br>
> Br 2.461756350 2.558726619 3.500000000<br>
> Br 2.461756350 0.278726619 3.500000000<br>
><br>
> K_POINTS {automatic}<br>
> 5 5 1 0 0 0<br>
><br>
><br>
> With Best Regards<br>
> Nipesh Dulal<br>
> Tribhuwan University<br>
> Kathmandu , Nepal<br>
><br>
><br>
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<span class="HOEnZb"><font color="#888888"><br>
--<br>
Dr. Lorenzo Paulatto<br>
IdR @ IMPMC -- CNRS & Université Paris 6<br>
phone: <a href="tel:%2B33%20%280%291%20442%2079822" value="+33144279822">+33 (0)1 442 79822</a> / skype: paulatz<br>
www: <a href="http://www-int.impmc.upmc.fr/~paulatto/" rel="noreferrer" target="_blank">http://www-int.impmc.upmc.fr/~<wbr>paulatto/</a><br>
mail: 23-24/423 Boîte courrier 115, 4 place Jussieu 75252 Paris Cédex 05<br>
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