diff --git a/src/bonsai/bonsai/bim/ifc.py b/src/bonsai/bonsai/bim/ifc.py
index b07e584a71..7fe03630c1 100644
--- a/src/bonsai/bonsai/bim/ifc.py
+++ b/src/bonsai/bonsai/bim/ifc.py
@@ -18,6 +18,7 @@
 
 from __future__ import annotations
 
+import gc
 import hashlib
 import os
 import shutil
@@ -170,7 +171,13 @@ class IfcStore:
                     # No point to trying again the same operation.
                     return
 
-                os.remove(IfcStore.cache_path)
+                # Force GC to release any dangling HDF5 C-level file handle (Windows).
+                gc.collect()
+                try:
+                    os.remove(IfcStore.cache_path)
+                except PermissionError as e:
+                    print(f"Could not delete locked cache file '{cache_path.name}': {str(e)}. Skipping cache.")
+                    return
                 try:
                     IfcStore.cache = ifcopenshell.geom.serializers.hdf5(
                         IfcStore.cache_path, cache_settings, serializer_settings
diff --git a/src/bonsai/bonsai/tool/raycast.py b/src/bonsai/bonsai/tool/raycast.py
index 70dae00438..cd5b19a1f2 100644
--- a/src/bonsai/bonsai/tool/raycast.py
+++ b/src/bonsai/bonsai/tool/raycast.py
@@ -25,6 +25,7 @@ import bmesh
 import bpy
 import mathutils
 import numpy as np
+from bpy_extras import view3d_utils
 from mathutils import Vector
 
 import bonsai.core.tool