Figure shows the convergence behavior as a function of T CutPNO for RI-MP2/(jun-)cc-pVDZ calculations on the L7 complexes. In five of seven systems, the DLPNO error exhibits non-monotonic behavior as the PNO thresholds are tightened, which is not observed in the absence of diffuse functions. This wreaks havoc with extrapolation, which need not be more accurate than even the loose-MP2 threshold result. (See Fig. for the L/N-and N/T-extrapolated results.) The same behavior is observed for the S12L complexes; see Fig. for the DLPNO errors and Fig. for the extrapolated results.