Motivated to identify systematic issues in torsion parameters, we developed a workflow to detect any dihedral deviation from a threshold value for each i-th MM optimized conformer with respect to the same i-th conformer optimized with QM. We performed the analysis on the public dataset (i) and counted all the torsion violations in MM structures that were off by more than 30 • threshold for any dihedral bond angle (Figure ). Some torsion parameters are more common than others, therefore we weighted by the number of times that it was used in the dataset. Most of the problematic parameters found by this analysis were also identified in the previous RCH set (Figure ), namely t17, t64, t66, t67, and t74. Interestingly, other parameters that appeared more frequently among the most concerning cases (>50 counted violations and >1 weighted violations) include t18 (torsion comprised by a tetra-and a trivalent C, Figure ) and t105 (torsion formed by a trivalent C and bivalent O). The results from this analysis can be part of the follow-up work and improvements to future OpenFF force field releases.