Hi Giacomo,
Gotcha! Thanks for the thorough explanation. Using the Chromium example from the website (https://tutorials.crystalsolutions.eu/tutorials/soc/Cr3_so_colu_fmix.d12) I think it is straightforward to do the conversion to CRYSTAL.
One final question, if I may. Should I add:
TWOCOMPON
SOC
ENDtwo
at the beginning or at the end of the SCF block, or it does not matter?
Chris