<div dir="ltr">Dear Amir,<div><br></div><div>This question has been asked a couple of times I think. Kindly search the forum first. For example see link below.</div><div><br></div><div><a href="http://qe-forge.org/pipermail/pw_forum/2011-April/094661.html">http://qe-forge.org/pipermail/pw_forum/2011-April/094661.html</a><br></div><div><br></div><div>For such a large change in energy in the last step I am guessing first of all that your ecutwfc/ecutrho are not converged. Either that or your cell shape/volume changed too drastically.</div><div><br></div><div>You need to restart the calculation with the final atomic coordinates and cell parameters in a new "from_scratch" run. But first converge your ecutrho/ecutwfc in a normal scf type run.</div><div><br></div><div>Regards,</div><div><div style="font-size:12.8px">Anand C.</div><div style="font-size:12.8px">Post-doctoral researcher</div><div style="font-size:12.8px">Materials Theory and Simulation Group</div><div style="font-size:12.8px">Indian Institute of Science, Bangalore, India</div></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 16, 2016 at 9:36 PM, Mofrad, Amir Mehdi (MU-Student) <span dir="ltr"><<a href="mailto:amzf5@mail.missouri.edu" target="_blank">amzf5@mail.missouri.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p>Dear all, <br>
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<p>After doing vc-relax calculations I can see that the total energy decreases until the last step and it suddenly increases by an order of 5. For example the total energy at one step before last one is<span><span style="color:rgb(255,0,0)"> -945.15760751</span>
and at the last step is <span style="color:rgb(255,0,0)">-940.59081276</span>. Does anyone know what the reason is?
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<p>Best,<br>
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<p>Amir M. Mofrad<span> <br>
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