<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi everyone<br>trying to relax my case(a large one with 24 atoms per cell) i get the famous error message:<br>"not orthogonal oporation"<br>i do use the symmetry-conserving Wentzecovic algorithm.<br>so what's the point?<br>Thanks for any comment.<br><br><br></td></tr></table><br>