<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Dear all,<div><br></div><div>I am running a structural optimization with QE 6.0. The structure is orthorhombic, ibrav=8, with 8 symmetry elements. The first run did not converge so I have to restart it. But as I restart it, the number of symmetry is now 4, there is a descent of symmetry. I shall say that I use the space_group option with COORDINATES crystal_sg. But the problem remains if I put all the coordinates (unsurprisingly).</div><div><br></div><div>Is there a reason for this, and can I avoid this?</div><div><br></div><div>Thank you</div><div>Best regards</div><div>Pascal</div><div><br></div><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div>-<br><div style="font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 15px; line-height: 22px;"><span style="color: rgb(34, 187, 234); font-size: 14px; font-family: verdana; font-weight: 700;">Pascal Boulet</span> <span style="color: rgb(34, 187, 234); font-size: 11px; font-family: verdana;"><em>- MCF HDR, Resp. L2 MPCI - DEPARTEMENT CHIMIE</em></span></div><div style="font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 15px; line-height: 22px;"><span style="font-size: 11px; font-family: verdana;">Aix-Marseille Université - </span><span style="font-size: 11px; font-family: verdana;">ST JEROME - Avenue Escadrille Normandie Niemen - 13013 Marseille</span></div><div style="font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 15px; line-height: 22px;"><span style="font-size: 11px; font-family: verdana;">Tél: +33(0)4 13 55 18 10 - Fax : +33(0)4 13 55 18 50</span></div><div><font face="verdana"><span style="font-size: 12px; line-height: 22px;">Site : </span></font><font color="#22bbea" face="verdana"><span style="font-size: 12px; line-height: 20px;"><a href="http://madirel.univ-">http://madirel.univ-</a></span></font><font face="verdana"><font color="#22bbea"><span style="font-size: 12px; line-height: 20px;"><a href="http://amu.fr/pages_web_BOULET_PASCAL/annuaire">amu.fr/pages_web_BOULET_PASCAL/annuaire</a></span></font><span style="font-size: 12px; line-height: 22px;"> - Email : </span></font><a href="mailto:pascal.boulet@univ-amu.fr" style="color: rgb(34, 187, 234); font-family: verdana; font-size: 12px; line-height: 20px; text-decoration: none;">pascal.boulet@univ-amu.fr</a></div></div><div><br></div></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div></body></html>