DLPNO errors are quite small for the S66 complexes but at the same time |∆E| ranges only from 1-19 kcal/mol for these small dimers, whereas van der Waals complexes with 100 atoms may have interaction energies that exceed 100 kcal/mol. In this section we examine the L7 + bbr and S12L data sets in detail, using calculations at the RI-MP2 level, and in particular we examine the extent to which the DLPNO error can be extrapolated to zero as a function of T CutPNO . DLPNO errors for the L7 + bbr complexes are plotted in Fig. , computed at the RI-MP2/cc-pVDZ level. These errors are much larger than the corresponding errors for S66, except (debatably) for the tight-MP2 thresholds. Mean and maximum DLPNO errors can be found in Table , as a function of T CutPNO , and these statistics indicate that thresholds looser than normal-MP2 afford MAEs larger than 1 kcal/mol. Notably, this includes the tight-CCSD(T) thresholds, where the MAE is close to 1 kcal/mol but the maximum error (for the bbr complex) is about 4 kcal/mol. In addition, percentage errors for the ggg complex (with |∆E| ≈ 2 kcal/mol) and for bbr are not reduced below 10% unless normal-or tight-MP2 thresholds are used [Fig. ]. Results with tight-MP2 thresholds are nearly indistinguishable from canonical RI-MP2 interaction energies. It is worth remembering, however, that "loose-MP2" thresholds are roughly equivalent to "tight-CCSD(T)" thresholds.