<p>
        When i calculated the carrier mobility using epw2.in as the example.
</p>
<p>
        I got the message like that:
</p>
<p>
              Conduction band minimum = ********** eV
</p>
<p>
        <br>
</p>
<p>
            Temp [K]  Fermi [eV]  Elec density [cm^-3]  Elec mobility [cm^2/Vs]
</p>
     ===================================================================<br>
<br>
       50.000     10.6630       0.000000E+00                NaN  x-axis<br>
                                                            NaN  y-axis<br>
                                                            NaN  z-axis<br>
                                                            NaN     avg<br>
      800.000     11.7971       0.000000E+00                NaN  x-axis<br>
                                                            NaN  y-axis<br>
                                                            NaN  z-axis<br>
<p>
                                                                    NaN     avg
</p>
<p>
        I thought there must be some wrong in my epw2.in files. but I don't know why ?
</p>
<p>
        <br>
</p>
<p>
        Hoping to receive letters.
</p>
<p>
        <br>
</p>
<p>
        Your sincerely 
</p>
<span>
<p>
        ShaoFei Wang
</p>
<p class="MsoNormal">
        <o:p></o:p>
</p>
</span>