The HBCG option specifies the hydrogen bond energy parameters to be used for this search. See HBOND Syntax, for more details. The NBCG option specified the non-bonded energy parameters to be used for this search. See Non-bonded Interactions, for more details. Please note that only the ATOM and CONS electrostatic options are supported. In addition, the CONS option used for evaluating sidechain conformations is slightly different than used for other energy evaluations, in that the surrounding field is ignored.
The EIGNORE EVDW option directs the program to ignore the van der Waals term in the calculation of all energies.