Well I do quite od bit of level juggling, so I sometimes find some use for @L1. In this case I tried multiple levels, and modifications of lists. but nothing seems to work. Eliminating the list level, flattening both lists after that, changing both to level 2, nothing seems to work. I constantly get the same error.
A little update. I’ve chopped the point list (the one that goes into TagLocations), so now I’ve got all the lists with an identical structure. Now, when I give all the inputs L1, the same error appears,(room not iterable), and gives a correct number of elements (282). But when I turn levels off, or use L2, it gives a different error (There is no tag available), and gives an icorrect number of elements (60, which is the number of sublists)