Hi,<div><br></div><div>I want to run a multi-state caspt2 calculation for a molecule with 98 electrons, with a 2-elec 2-orb active space. The MCSCF part of the input is </div><div><div><br></div><div> {multi </div><div> closed,42,6</div>
<div> occ,42,8</div><div> wf,98,1,0</div><div> state,2</div><div> noextra</div><div> canonical,ci} </div><div><br></div><div>following which I would like to do caspt2 on one state or with 2-ref state. It seems that MS-CASPT2 is only available in RS2 (not RS2C). I cannot use RS2 because of a upper limit on active orbital and it was suggest by Kirk to use RS2C ( here <a href="http://www.molpro.net/pipermail/molpro-user/2006-April/001759.html" target="_blank">http://www.molpro.net/pipermail/molpro-user/2006-April/001759.html</a>).</div>
<div><br></div><div>I get this message </div><div> >>> MultiStateCaspt2 not yet implemented for RS2c >>></div><div>when I try to use RS2c. I am guessing if I try RS2, i would get a error of "too many active orbitals"</div>
<div><br></div><div>Is there a way run MS-caspt2 with active space choice as above?</div><div><br></div><div>Thanks</div><div>Amit Sharma</div><div>CSE, Argonne National Lab.</div><div><br></div></div>