As a first test, the protocol has been applied to a formaldehyde oxime (FO) dimer. Excitonic couplings were computed for three configurations of the dimer representing mutual displacements of the monomers along the x, y, and z axes, see Figure , in the range from 2 to 8 Å. We considered two monomer transitions S 0 →S 1 and S 0 →S 2 , with the second one being notably more intense, see Table . Further note that the two transitions have different dipole directions, i.e., parallel to z and x for S 0 →S 1 and S 0 →S 2 , respectively. Hence, the cases studied should show J-as well as H-type behavior with respect to their absorption spectrum.