<div>Hi Fabian</div><div><br></div><div>Thanks for your response. I tried your suggestions, but that did not help me. My SCF cycle energies are still going haywire. Any other thoughts?</div><div><br></div><div>Regards</div><div>Kush<br></div><br><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Tuesday, November 30, 2021 at 7:56:12 PM UTC+5:30 fabia...@gmail.com wrote:<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>
<p>Hi Kush,</p>
<p>Your eps values are probably not tight enough, try lowering them:<br>
</p>
<p> EPS_DEFAULT 1.0E-10 -> EPS_DEFAULT 1.0E-12<br>
EPS_PGF_ORB 1.0E-03 -> EPS_PGF_ORB 1.0E-06 or lower
(this probably even triggers a warning in your output!)<br>
</p>
<p> EPS_SCHWARZ 1.0E-6 -> EPS_SCHWARZ 1.0E-7 or lower<br>
</p>
<p>Also MAX_SCF for the inner scf loop should not be larger than 30:</p>
<p>MAX_SCF 300 -> MAX_SCF 30<br>
</p>
<p>Cheers,</p>
<p>Fabian<br>
</p></div><div>
<div>On 30.11.2021 13:24, Kushagra Agrawal
wrote:<br>
</div>
</div><div><blockquote type="cite">
<div>Hi</div>
<div>I am trying to run a DFT calculation for the QM part of a
QM/MM region with hybrid functional PBE0.</div>
<div>When I run it, the energy of SCF gives random value for each
iteration instead of systematically going<img alt=""> down as expected. Naturally,
the system also does not converge after long cycles. can someone
point to what could be wrong in my file. I am attaching my input
file here for reference.</div>
<div>Regards</div>
<div>Kush<img alt=""></div></blockquote></div><div><blockquote type="cite">
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