<div dir="ltr"><div><div><div>One more information,<br>I have used 1.0d-10 SCF convergence threshold.<br><br><br></div>Should I decrease alpha_mix? I guess increasing tr2_ph is quite a bad idea, though I have done that by setting it to 1.0d-10.<br><br></div>Best regards<br></div>Subhodip<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 27, 2016 at 3:21 AM, Subhodip Chatterjee <span dir="ltr"><<a href="mailto:subhopcqc@gmail.com" target="_blank">subhopcqc@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear all,<div><br></div><div>I'm trying to perform a phonon dispersion calculation with the input parameters</div><div>tr2_ph = 1.0d-10</div><div>alpha_mix = 0.3</div><div>nq1 = 4</div><div>nq2 = 4</div><div>nq3 = 4</div><div><br></div><div>The SCF calculation was done with </div><div>KPOINTS (automatic)</div><div>8 8 8 0 0 0</div><div><br></div><div>Now the problem is, while at some q-points convergence is achieved within 10 steps, in other it is not converged even after 100 steps, and as a result the job gets terminated. What could be the reason?</div><div><br></div><div>Best regards</div><span class="HOEnZb"><font color="#888888"><div>Subhodip<br clear="all"><div><br></div>-- <br><div data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><span style="color:rgb(0,0,0)"></span><span style="color:rgb(0,0,0)"><b>Subhodip Chatterjee</b></span><br><span style="color:rgb(0,0,0)"></span></div></div><div><span style="color:rgb(0,0,0)"><b>Junior Research Fellow<br></b></span></div><div><span style="color:rgb(0,0,0)"><b>Department of Chemistry<br></b></span></div><span style="color:rgb(0,0,0)"><b>University of Calcutta</b><br></span></div><div><span style="color:rgb(0,0,0)"><b>Kolkata, India</b></span><br></div></div></div></div></div></div></div></div>
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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><div dir="ltr"><div><div dir="ltr"><div><div><span style="color:rgb(0,0,0)"></span><span style="color:rgb(0,0,0)"><b>Subhodip Chatterjee</b></span><br><span style="color:rgb(0,0,0)"></span></div></div><div><span style="color:rgb(0,0,0)"><b>Junior Research Fellow<br></b></span></div><div><span style="color:rgb(0,0,0)"><b>Department of Chemistry<br></b></span></div><span style="color:rgb(0,0,0)"><b>University of Calcutta</b><br></span></div><div><span style="color:rgb(0,0,0)"><b>Kolkata, India</b></span><br></div></div></div></div></div></div></div></div>
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