<div dir="ltr"><div><font size="4"><span class="gmail_default" style="font-size:large">Dear Tran,</span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large">Thanks for explaining the meaning of warnings.</span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large">Yes, warning disappears by increasing Gmax to 14.</span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large"><br></span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large">What is mean by NCON?</span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large">In which file it is written and is there any batch command to increase it?</span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large"><br></span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large">Regards</span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large">Bhamu<br></span></font></div><div><font size="4"><span class="gmail_default" style="font-size:large"></span><span class="gmail_default" style="font-size:large"></span></font></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Aug 25, 2019 at 4:17 PM <<a href="mailto:tran@theochem.tuwien.ac.at">tran@theochem.tuwien.ac.at</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">This is a warning from lapw0, which indicates that the Fourier expansion<br>
of the Coulomb potential may not be well converged. Increase GMAX in<br>
case.in2 to 16 to see if this warning disappears.<br>
<br>
<br>
On Sunday 2019-08-25 12:10, Dr. K. C. Bhamu wrote:<br>
<br>
>Date: Sun, 25 Aug 2019 12:10:49<br>
>From: Dr. K. C. Bhamu <<a href="mailto:kcbhamu85@gmail.com" target="_blank">kcbhamu85@gmail.com</a>><br>
>Reply-To: A Mailing list for WIEN2k users <<a href="mailto:wien@zeus.theochem.tuwien.ac.at" target="_blank">wien@zeus.theochem.tuwien.ac.at</a>><br>
>To: A Mailing list for WIEN2k users <<a href="mailto:Wien@zeus.theochem.tuwien.ac.at" target="_blank">Wien@zeus.theochem.tuwien.ac.at</a>><br>
>Subject: [Wien] VK-COUL not well converged: Increase GMAX or decrease NCON<br>
><br>
>Dear Experts,<br>
>We are running a GGA-PBE calculation on a cubic double perovskite on Wien2k_19.1 with intel compilers with<br>
><br>
> 8 10 6 ELPA pxq hm (R-MT*K-MAX,MAX L IN WF,V-NMT,lib,gridshape,hm/lm)<br>
>GMAX=12<br>
>We are getting VK-COUL error.<br>
><br>
>Exact warning is this: VK-COUL not well converged: Increase GMAX or decrease NCON<br>
>There is no information on mailing list and UG on this warning.<br>
>Could someone please explore the meaning of these warnings?<br>
><br>
>PS: Running scf with dense k-mesh on a scf that was finished with Wien2k_18.2.<br>
><br>
>regards<br>
>Bhamu<br>
><br>
><br>
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