<div dir="ltr"><div>Dear All,</div><div><br></div><div>Greetings.</div><div><br></div><div>I am performing a local correlated CCSD(T) computation using density fitting approximation.The atoms that are involved in the computation are K, C, N, and H.</div><div><br></div><div>The following basis set block was used:</div><div>basis={</div><div>default,avdz</div><div>K=ECP10MWB (or LANL2DZ or ECP10MDF)</div><div><br></div><div>set,mp2fit,</div><div>default,avdz/mp2fit</div><div>spdf,K,def2-qzvpp/mp2fit;c </div><div><br></div><div>set,dfjk,</div><div>default,avdz/jkfit</div><div>spdfg,K,def2-qzvpp/jkfit;c </div><div>}</div><div><br></div><div>{df-hf,df_basis=dfjk;wf,105,1,1}</div><div>DF-LUCCSD(T),basis_mp2=mp2fit,basis_ccsd=mp2fit</div><div><br></div><div>1)<span class="" style="white-space:pre"> </span>However, the following error was obtained when using the ECP10MWB or LANL2DZ as basis set/s for K: </div><div><br></div><div>“in reltripldom: MXDOMT exceeded 71136”</div><div><br></div><div>2)<span class="" style="white-space:pre"> </span>And when using ECP10MDF as basis set, an hf convergence error was obtained:</div><div><br></div><div>“?Error: RHF not converged. This error exit can be avoided using the IGNORE_ERROR option on the ORBITAL directive”</div><div><br></div><div>Please note that I have tried to solve this problem using “orbital,ignore_error” or even a level shifting of -1.0,-0.5 as indicated in the online Molpro manual for difficult hf convergence. However, these are not working. </div><div><br></div><div>Can you please advise how to solve these problems? Or do you suggest me to use any other ecp basis set for K?</div><div><br></div><div>Please also note that when using all-electron basis sets for K, I do not come across the above mentioned problems.</div><div><br></div><div>Thank you.</div><div><br></div><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><font face="arial, helvetica, sans-serif">Kind regards,</font></div><div><font face="arial, helvetica, sans-serif">Hanusha</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">*** <span style="text-align:center">I do not fear computers. I fear the lack of them. </span></font></div><div style="text-align:left"><font face="arial, helvetica, sans-serif"> </font></div><div style="text-align:left"><font face="arial, helvetica, sans-serif"> ~ Issac Asimov ***</font></div><div><font face="arial, helvetica, sans-serif">---------------------------</font></div><div><font face="arial, helvetica, sans-serif">Hanusha Bhakhoa<br></font></div><div><font face="arial, helvetica, sans-serif">MPhil/PhD Scholar</font></div><div><font face="arial, helvetica, sans-serif"><a href="http://sites.uom.ac.mu/ccuom/" target="_blank">Computational Chemistry Group</a> </font></div><div><font face="arial, helvetica, sans-serif">Department of Chemistry</font></div><div><a href="http://www.uom.ac.mu/" target="_blank"><font face="arial, helvetica, sans-serif">University of Mauritius</font></a></div><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div>
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