<div dir="ltr"><br clear="all"><div>Sir,</div><div> I'm having trouble optimizing conical intersection.</div><div>Error message I'm having is--</div><div>" ? Error</div><div> ? No convergence</div><div> ? The problem occurs in Multi</div><div>"</div><div>Here is my input</div><div>***, PH3</div><div>print,orbitals,civector</div><div>geomtyp=xyz !Do not change!</div><div>geometry={</div><div>4</div><div>Ph3 conical intersection search</div><div> P 0.000000 0.000000 0.000000</div><div> H 0.000000 0.000000 1.008000</div><div> H 0.950353 0.000000 -0.335996</div><div> H -0.475176 -0.823029 -0.336000</div><div>}</div><div>basis=6-31G(d,p)</div><div><br></div><div>{rhf;</div><div>wf,18,1,0;</div><div>} !save orbitals to record 2100.2 (default)</div><div><br></div><div>{multi;occ,14;closed,5;</div><div>wf,18,1,0;state,2;</div><div>CPMCSCF,NACM,1.1,2.1,accu=1.0d-5,record=5100.1 !cpmcscf for non-adiabatic couplings</div><div>CPMCSCF,GRAD,1.1,spin=0,accu=1.0d-5,record=5101.1 !gradient for state 1</div><div>CPMCSCF,GRAD,2.1,spin=0,accu=1.0d-5,record=5102.1} !gradient for state 2</div><div><br></div><div><br></div><div>{Force</div><div>SAMC,5100.1 !compute coupling matrix element</div><div>CONICAL,6100.1} !save information for optimization of conical intersection</div><div><br></div><div>{Force</div><div>SAMC,5101.1 !compute gradient for state 1</div><div>CONICAL,6100.1} !save information for optimization of conical intersection</div><div><br></div><div>{Force</div><div>SAMC,5102.1 !compute gradient for state 2</div><div>CONICAL,6100.1} !save information for optimization of conical intersection</div><div><br></div><div>optg,startcmd=multi,gradient=1.d-5,maxit=500 !find conical intersection</div><div><br></div><div><br></div><div>So please tell where I'm doing wrong.</div><div>Thanks </div>-- <br><div class="gmail_signature"><div dir="ltr"><div><font color="#cc0000"><b>Best Wishes & Regards</b></font></div><div><font color="#274e13"><br></font></div><font color="#0000ff"><b><i>Subhendu Ghosh</i></b></font><div><font color="#0000ff"><b><i>Banaras Hindu University</i></b></font></div></div></div>
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