Dear Ray, <div><br></div><div>There are several things that you can improve in the input. </div><div>The SVZ basis is rather poor. The cutoff 300 is low.</div><div>You are using PADE functional (why?) with PBE pseudo potentials. </div><div>The mixing factor for the diagonalizatin scheme is too large. </div><div>The diagonalization with mixing of the density matrix might be not the best choice for your system. </div><div> Regards</div><div>Marcella</div><div><br></div><div class="gmail_quote"><div dir="auto" class="gmail_attr">On Thursday, November 18, 2021 at 10:41:35 PM UTC+1 raymonds...@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>Hi all,</div><div><br></div><div>I'm attempting to run an energy and force calculation on an organic molecule but the SCF energy change between steps is just oscillating between 2.46E-04 and -2.46E-04. I've tried a few basis sets (SZV, DZVP) and functionals (BLYP, PBE) but I obtain the same results. My suspicion is that the fluorine is causing problems since I have similar systems without fluorine that run fine. Any advice would be greatly appreciated!</div><div><br></div><div>Thank you for your time,</div><div>Ray<br></div></blockquote></div>
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