For the 1-3 linkages, some atoms were not automatically mapped, principally as a consequence of the graph growing in the wrong direction along the ring atoms after assignment of the glycosidic bead. In the 1-6 case where there were errors, these arose due to some atoms being wrongly assigned in the glycosidic region-resulting in a "split" unrealistic bead. Both of these scenarios are potentially the consequence of the mapping being based on the Amber atom naming scheme.