diff --git a/tools/adaptive-isogrid/src/nx/import_profile.py b/tools/adaptive-isogrid/src/nx/import_profile.py
index 1b5bd7b0..65df8425 100644
--- a/tools/adaptive-isogrid/src/nx/import_profile.py
+++ b/tools/adaptive-isogrid/src/nx/import_profile.py
@@ -118,32 +118,55 @@ def _find_or_create_sketch(
     origin_pt = NXOpen.Point3d(origin[0], origin[1], origin[2])
     normal_vec = NXOpen.Vector3d(normal[0], normal[1], normal[2])
     x_vec = NXOpen.Vector3d(x_axis[0], x_axis[1], x_axis[2])
-    y_axis = transform["y_axis"]
-    y_vec = NXOpen.Vector3d(y_axis[0], y_axis[1], y_axis[2])
 
-    # Build Matrix3x3 from x_axis, y_axis, normal (row-major: Xx,Xy,Xz, Yx,Yy,Yz, Zx,Zy,Zz)
-    mtx = NXOpen.Matrix3x3()
-    mtx.Xx = x_axis[0]; mtx.Xy = x_axis[1]; mtx.Xz = x_axis[2]
-    mtx.Yx = y_axis[0]; mtx.Yy = y_axis[1]; mtx.Yz = y_axis[2]
-    mtx.Zx = normal[0]; mtx.Zy = normal[1]; mtx.Zz = normal[2]
+    # Create a Plane (SmartObject) — NOT a DatumPlane (DisplayableObject)
+    # PlaneCollection.CreatePlane(method, alternate, origin, normal, expr, flip, percent, geometry)
+    plane = part.Planes.CreatePlane(
+        NXOpen.PlaneTypes.MethodType.Fixed,            # Fixed plane
+        NXOpen.PlaneTypes.AlternateType.One,
+        origin_pt,
+        normal_vec,
+        "",                                             # expression
+        False,                                          # flip
+        False,                                          # percent
+        [],                                             # geometry refs
+    )
+    lister.WriteLine(f"[import] Created plane: {plane} (type={type(plane).__name__})")
 
-    # Create fixed datum plane
-    datum_plane = part.Datums.CreateFixedDatumPlane(origin_pt, mtx)
-    lister.WriteLine(f"[import] Created datum plane: {datum_plane}")
+    if plane is None:
+        # Fallback: try Distance method
+        plane = part.Planes.CreatePlane(
+            NXOpen.PlaneTypes.MethodType.Distance,
+            NXOpen.PlaneTypes.AlternateType.One,
+            origin_pt, normal_vec, "", False, False, [],
+        )
+        lister.WriteLine(f"[import] Fallback plane: {plane}")
+
+    if plane is None:
+        # Fallback 2: CreateFixedTypePlane
+        y_axis_t = transform["y_axis"]
+        mtx = NXOpen.Matrix3x3()
+        mtx.Xx = x_axis[0]; mtx.Xy = x_axis[1]; mtx.Xz = x_axis[2]
+        mtx.Yx = y_axis_t[0]; mtx.Yy = y_axis_t[1]; mtx.Yz = y_axis_t[2]
+        mtx.Zx = normal[0]; mtx.Zy = normal[1]; mtx.Zz = normal[2]
+        plane = part.Planes.CreateFixedTypePlane(
+            origin_pt, mtx, NXOpen.SmartObject.UpdateOption.WithinModeling,
+        )
+        lister.WriteLine(f"[import] Fallback2 plane: {plane}")
 
     # Create sketch-in-place builder
     sketch_builder = part.Sketches.CreateSketchInPlaceBuilder2(NXOpen.Sketch.Null)
 
-    # Set plane — PlaneReference is a property setter
-    sketch_builder.PlaneReference = datum_plane
+    # These are method calls (verified from MCP .pyi stubs), not property setters
+    sketch_builder.PlaneReference(plane)
 
-    # Set sketch origin
     origin_point = part.Points.CreatePoint(origin_pt)
-    sketch_builder.SketchOrigin = origin_point
+    sketch_builder.SketchOrigin(origin_point)
 
-    # Set axis reference
-    axis_dir = part.Directions.CreateDirection(origin_pt, x_vec, NXOpen.SmartObject.UpdateOption.WithinModeling)
-    sketch_builder.AxisReference = axis_dir
+    axis_dir = part.Directions.CreateDirection(
+        origin_pt, x_vec, NXOpen.SmartObject.UpdateOption.WithinModeling,
+    )
+    sketch_builder.AxisReference(axis_dir)
 
     # Commit to create the sketch
     sketch_feature = sketch_builder.CommitFeature()