Dear Molpro users,<br><br>I've been trying to calculate the spin-orbit couplings for a series of molecules, which span up to 100 electrons. When I run my calculations I can find the following error printed once the CI program is entered.<br>
<br> TOO MANY ACTIVE ORBITALS: 35 THIS VERSION ALLOWS 32<br><br>I somehow sorted the problem out and I verified my reasoning from couple of posts to the molpro-user mailing list. The obvious solution would be increasing the number of frozen-core orbitals which I apparantly did but with no success. Is there any specific reason why this didn't work in this particular case or did I miss something obvious? <br>
<br>This is my input together with the "core" directive. <br><br> { multi;<br> occ, 47; closed,37; <br> rotate,31.1,40.1,0;<br> rotate,35.1,41.1,0;<br> rotate,47.1,52.1,0;<br> wf,84,1,0;state,1;weight,1;<br>
wf,84,1,2;state,1;weight,1;}<br> <br> {ci;wf,84,1,0;occ,47,closed,37,core,15;save,3010.1,state,1;noexc} <br> {ci;wf,84,1,2;occ,47,closed,37,core,15;save,3040.1;state,1;noexc} <br><br>This particular molecule has 12 heavy atoms. I need to use (10,10) active space for CASSCF wavefunction. I expected the "core" directive to cut orbitals 3 more from the active orbitals in CI program to get to the maximal number of allowed orbitals (32; 47-15). However, it seems that the program still counts only the inner-shell orbitals of heavy atoms, i.e. 12 (47-12). When I increased the number of frozen-core orbitals to 18, nothing has changed and the job crashed. What might be wrong?<br>
<br>Thank you for any help with this. Cheers<br><br><br>tomas<br>