Hello, I have noticed something that I am not sure if it's a bug or not. I am trying to export a selected bit of a survey as a loch file: source "data/system_migovec.th" select vrtnarija_vilinska@system_migovec export model -o outputs/vrtnarija.lox This seems to correctly export the centerline only for "vrtnarija_vilinska" but if I turn on the walls in loch then other bits of the survey are shown. Centerline correct: [image: image.png] With walls there are other bits of passage shown: [image: image.png] These seem to correspond to bits of passage that have splays and LRUD data so it seems like those aren't correctly filtered out using the "select". Using: therion 5.5.6 (2020-12-27) - using Proj 6.3.1, compiled against 6.3.1 Thanks, Rhys
