<div dir="ltr"><div lang="EN-IN" link="blue" vlink="#954F72" style="word-wrap:break-word"><div class="m_-7165675703683422584WordSection1"><p class="MsoNormal"><u></u> <u></u></p><div id="gmail-:1rd" class="gmail-Ar gmail-Au gmail-Ao"><div id="gmail-:1r9" class="gmail-Am gmail-Al editable gmail-LW-avf gmail-tS-tW gmail-tS-tY" aria-label="Message Body" role="textbox" aria-multiline="true" tabindex="1" aria-controls=":1u3" style="direction:ltr;min-height:303px">I am doing the optimization of a system of 51 atoms containing two dfferent types of atoms C and N using M06 functional.I used the ONCV pseudo potential for both C_ONCV_PBE-1.0.UPF and N_ONCV_PBE-
1.0 .UPF for C and N respectively.But I am getting an output with the error :<div><b><br></b></div><div><b>Error in routine C_bands</b></div><div><b>Too many bands are not converged</b></div><div><b><br></b></div><div><b><br></b></div><div>I changed the pseudo potential for C and N as C_ONCV_PBE-1.2.UPF and N_ONCV_PBE- 1.2.UPF . Again it shows the same error</div><div><div><b><br></b></div><div><b>Error in routine C_bands</b></div><div><b>Too many bands are not converged</b></div></div><div><b><br></b></div><div>What is the reason behind the problem.How can I solve this ?</div><div>Thanks in advance</div></div></div><p class="MsoNormal"><span><span><u></u> <u></u></span></span></p></div></div></div>