<HTML><BODY><P>Dear all,<BR>I am trying to calculate Born effective charges from DFTP for the spin-polarized system. However, these systems must be treated as metallic (scf-calculation with occupations='smearing').<BR>The problem is that ph.x complains about my calculation, but the system has an insulator behavior.<BR>Are there any methods to solve this problem?<BR> <BR>Sincerely,<BR>Sergey Nikolaev<BR>Department of theoretical physics and applied mathematics<BR>Ural Federal University<BR>Yekaterinburg, Russia<BR><BR data-mce-bogus="1"></P></BODY></HTML>