The following options may be specified in the SCF directive in regards to WF-in-DFT embedding.
This option refers to the calculation of the first-order correction to the energy, described in the following paper:
F. R. Manby, M. Stella, J. D. Goodpaster, and T. F. Miller III, J. Chem. Theory Comput., 8, 2564 (2012)
The value HF_COR=1 causes the first-order correction to be calculated and automatically added to the energy. The value HF_COR=0 stops the first-order correction from being calculated.