Handle RuntimeError in alignment geometry generation

Add RuntimeError handling for IfcOpenShell versions that don't support
the piecewise-step-type setting in geometry generation.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/bonsai/bonsai/tool/alignment.py

@@ -308,7 +308,8 @@ class Alignment:
         # Generate vertices using IfcOpenShell's geometry engine
         try:
             vertices = align_util.generate_vertices(rep_curve, distance_interval=1.0)
-        except (ValueError, NotImplementedError):
+        except (ValueError, NotImplementedError, RuntimeError):
+            # RuntimeError can occur if IfcOpenShell version doesn't support certain settings
             return None
 
         if len(vertices) < 2:

src/ifcopenshell-python/ifcopenshell/api/alignment/util.py

@@ -90,7 +90,10 @@ def generate_vertices(rep_curve: entity_instance, distance_interval: float = 5.0
         )
 
     s = ifcopenshell.geom.settings()
-    s.set("piecewise-step-type", 0)  # 0 = step-size is maximum step size, 1 = step-size is mininimum number of steps
+    try:
+        s.set("piecewise-step-type", 0)  # 0 = step-size is maximum step size, 1 = step-size is mininimum number of steps
+    except RuntimeError:
+        pass  # Setting not available in older IfcOpenShell versions
     s.set("piecewise-step-size", distance_interval)
     shape = ifcopenshell.geom.create_shape(s, rep_curve)
     vertices = shape.verts