<html><body><div style="color:; background-color:; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span><font class="Apple-style-span" size="2"><div>Dear all,</div><div>i am trying to plot bandstructure, but i have a problem that marked red in picture attached.</div><div>what should i do?</div><div><br></div><div><br></div></font></span></div><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; "> </div><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; ">Mahdi Faghih nasiri<br>MSC,<br>Guilan University,<br>Rasht, Iran.</div></div></body></html>