Unusually large (and in one case, divergent) values of ω IE may reflect an attempt by the tuning procedure to mitigate self-interaction error in the ground state, effectively hacking the LRC-ωPBE ansatz to turn it into a short-range hybrid functional by making 1/ω small. (Indeed, both ω IE and ω GDD are larger for this whole data set, as compared to values that are typical in closedshell systems.) However, LRC-ω IE PBEh functional with c hfx = 0.2 exhibit similar pathologies for OH, NCO, and CN; see Table . Apparently, 20% exact exchange at short range is insufficient to avoid these unusually large values of ω IE .