<DIV id=RTEContent>Dear All users:</DIV>  <DIV> i am new users, when i relax supperlattice "BaTiO3/SrTiO3", the error appeared:  from invmat : error #         2<BR>                error in DGETRF</DIV>  <DIV>,please tell me why?</DIV>  <DIV> </DIV>  <DIV>Regards</DIV>  <DIV> </DIV>  <DIV> </DIV>  <DIV>                                                                zhuzhenye</DIV>  <DIV><BR> </DIV><p>__________________________________________________<br>¸Ï¿ì×¢²áÑÅ»¢³¬´óÈÝÁ¿Ãâ·ÑÓÊÏä?<br>http://cn.mail.yahoo.com