Fig. . Absolute DLPNO errors for counterpoise-corrected S66 interaction energies computed at the RI-MP2/cc-pVXZ level for (a) X = D, (b) X = T, or (c) X = Q. Data are shown for six different sets of PNO thresholds (see Table ), typifying values used for either CCSD(T) or MP2 calculations, as indicated. Note that all interaction energies are RI-MP2, even when thresholds typical of CCSD(T) are used. Gray traces represent individual S66 dimers and the orange trace represents the average. ), even though the calculations reported here are MP2. c Using PNO thresholds for MP2 (Table ).