<div dir="ltr">On Fri, Jan 26, 2018 at 4:27 PM, Paolo Giannozzi <span dir="ltr"><<a href="mailto:p.giannozzi@gmail.com" target="_blank">p.giannozzi@gmail.com</a>></span> wrote:<br><br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>There are compiler options that catch invalid operations (e.g. -fpe0 for Intel compiler)<br></div></div></blockquote><div><br></div><div>well, no, -fpe-all=0. There is actually a division by zero. Thank you for reporting this<br><br></div><div>Paolo<br></div><div> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div>Paolo<br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Fri, Jan 26, 2018 at 6:09 AM, zhout2 <span dir="ltr"><<a href="mailto:zhout2@rpi.edu" target="_blank">zhout2@rpi.edu</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">Dear QE community,<br>
<br>
I was using pwcond.x to do conductance calculations for metals, which were successful in many systems, but failed in a few others, in which cases the calculated transmission coefficients are -NAN, as below:<br>
<br>
<br>
to transmit<br>
Band j to band i transmissions and reflections:<br>
j i |T_ij|^2 |R_ij|^2<br>
<br>
1 --> 1 -NAN -NAN<br>
1 --> 2 -NAN -NAN<br>
...<br>
1 --> 7 -NAN -NAN<br>
Total T_j, R_j = -NAN -NAN<br>
<br>
As the calculations were not interrupted and no error message was given, I am struggling to find the cause of error. Could someone offer some insight?<br>
<br>
I have tried qe 5.1, 5.4 and 6.1, yet this error always appeared. The crystal structure I used should be correct, because for some other elements the calculations were successful. I'm attaching both scf and pwcond files, though there was nothing wrong I could notice with the scf step.<br>
<br>
Thanks and best regards,<br>
<br>
Tianji<br>
<br>
<br>
<br>
Tianji Zhou<br>
Department of Materials Science and Engineering<br>
Rensselaer Polytechnic Institute<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>
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