diff --git a/src/ifcopenshell-python/ifcopenshell/api/geometry/regenerate_wall_representation.py b/src/ifcopenshell-python/ifcopenshell/api/geometry/regenerate_wall_representation.py
index 0b748d7e0c..43bb761f81 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/geometry/regenerate_wall_representation.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/geometry/regenerate_wall_representation.py
@@ -548,7 +548,7 @@ class Regenerator:
         material = ifcopenshell.util.element.get_material(wall, should_skip_usage=True)
         if not material or not material.is_a("IfcMaterialLayerSet"):
             return []
-        return [PrioritisedLayer(l.Priority or 0, l.LayerThickness) for l in material.MaterialLayers]
+        return [PrioritisedLayer(getattr(l, "Priority", 0) or 0, l.LayerThickness) for l in material.MaterialLayers]
 
     def combine_layers(self, layers, override_priorities):
         results = []
diff --git a/src/ifcopenshell-python/ifcopenshell/util/representation.py b/src/ifcopenshell-python/ifcopenshell/util/representation.py
index f5233005af..a628ea6c88 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/representation.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/representation.py
@@ -480,7 +480,7 @@ def get_reference_line(wall: ifcopenshell.entity_instance, fallback_length: floa
     if axis := ifcopenshell.util.representation.get_representation(wall, "Plan", "Axis", "GRAPH_VIEW"):
         for item in ifcopenshell.util.representation.resolve_representation(axis).Items:
             if item.is_a("IfcPolyline"):
-                points = item.Points
+                points = [p[0] for p in item.Points]
             elif item.is_a("IfcIndexedPolyCurve"):
                 points = item.Points.CoordList
             else: