However, the results drastically deteriorate for aug-cc-pVQZ, especially with loose settings, e.g., multi-level DLPNO-CCSD(T 0 ) with a target accuracy of NORMALPNO has an MAD of 27.7 kJ • mol -1 for reaction energies and 54.3 kJ • mol -1 for barrier heights. To give further insights into this deterioration, the errors were decomposed into the individual errors of the DLPNO-CCSD and DLPNO-(T 0 ) corrections (Tab. 5). While the MADs and SDs are relatively small for the DLPNO-CCSD correction, in particular for multi-level DLPNO-CCSD(T 0 ) with a target accuracy of TIGHTPNO, it can be seen that a large part of the error originates from the semi-canonical triples approximation. Here, the DLPNO-(T 0 ) correction is highly sensitive to changes in the employed DLPNO thresholds and the triples cutoff. This sensibility and the resulting inaccuracy is probably caused by the decrease of the HOMO-LUMO gap for increasing the basis set from aug-cc-pVTZ to aug-cc-pVQZ (see Tab. SXII of the Supporting Information).