diff --git a/Nef_3/include/CGAL/Nef_3/SNC_FM_decorator.h b/Nef_3/include/CGAL/Nef_3/SNC_FM_decorator.h
index 515f3d39d37..04555411602 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_FM_decorator.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_FM_decorator.h
@@ -346,7 +346,7 @@ public:
 
   typedef CGAL::Halffacet_geometry<Point_3,Plane_3,Vertex_handle> 
     Halffacet_geometry;
-
+  using Base::debug; using Base::link_as_facet_cycle; using Base::info; using Base::link_as_interior_loop;
 protected:
   Halffacet_handle f_;
 public:
diff --git a/Nef_3/include/CGAL/Nef_3/SNC_SM_overlayer.h b/Nef_3/include/CGAL/Nef_3/SNC_SM_overlayer.h
index ba216736642..baa692b7479 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_SM_overlayer.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_SM_overlayer.h
@@ -223,6 +223,24 @@ class SNC_SM_overlayer<SNC_indexed_items, SM_decorator_>
 
   typedef typename Map::Infi_box Infi_box;
 
+  using SM_decorator::clear_face_cycle_entries;
+  using SM_decorator::link_as_loop;
+  using SM_decorator::link_as_prev_next_pair;
+  using SM_decorator::is_closed_at_source;
+  using SM_decorator::is_closed_at_target;
+  using SM_decorator::delete_edge_pair;
+  using SM_decorator::set_face;
+  using SM_decorator::is_isolated;
+  using SM_decorator::delete_vertex_only;
+  using SM_decorator::delete_face_only;
+  using SM_decorator::first_out_edge;
+  using SM_decorator::set_first_out_edge;
+  using SM_decorator::has_outdeg_two;
+  using SM_decorator::store_sm_boundary_object;
+  using SM_decorator::is_sm_boundary_object;
+  using SM_decorator::undo_sm_boundary_object;
+  using SM_decorator::delete_edge_pair_only;
+
  public:
   SNC_SM_overlayer(Map* M, 
 		   const Sphere_kernel& G = Sphere_kernel()) 
diff --git a/Nef_3/include/CGAL/Nef_3/SNC_constructor.h b/Nef_3/include/CGAL/Nef_3/SNC_constructor.h
index 9b3999f924b..583ab726265 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_constructor.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_constructor.h
@@ -1858,6 +1858,8 @@ class SNC_constructor<SNC_indexed_items, SNC_structure_>
 
   typedef typename SNC_structure::Mark      Mark;
 
+  using Base::create_from_plane;
+
   public:
   SNC_constructor( SNC_structure& W) : Base(W) {}
 
diff --git a/Nef_3/include/CGAL/Nef_3/SNC_external_structure.h b/Nef_3/include/CGAL/Nef_3/SNC_external_structure.h
index 28376a757c4..b3017e34b6e 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_external_structure.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_external_structure.h
@@ -387,7 +387,7 @@ public:
 	Halfedge_handle e2 = *itl;
 	while(normalized(e1->vector()) != normalized(-e2->vector())) {
 	  ++itl;
-	  make_twins(e1,*itl);
+	  this->make_twins(e1,*itl);
 	  e1 = e2;
 	  ++itl;
 	  e2 = *itl;
@@ -395,7 +395,7 @@ public:
 	CGAL_NEF_TRACEN("    " << e1->source()->point() 
 			<< " -> " << e2->source()->point());
 	CGAL_NEF_TRACEN(e1->vector()<<" -> "<<-e2->vector());
-	make_twins(e1,e2);
+	this->make_twins(e1,e2);
 	CGAL_assertion(e1->mark()==e2->mark());
 	
 	// discard temporary sphere_point ?
@@ -414,7 +414,7 @@ public:
 	Halfedge_handle e2 = *itl;
 	while(normalized(e1->vector()) != normalized(-e2->vector())) {
 	  ++itl;
-	  make_twins(e1,*itl);
+	  this->make_twins(e1,*itl);
 	  e1 = e2;
 	  ++itl;
 	  e2 = *itl;
@@ -422,7 +422,7 @@ public:
 	CGAL_NEF_TRACEN("    " << e1->source()->point() 
 			<< " -> " << e2->source()->point());
 	CGAL_NEF_TRACEN(e1->vector()<<" -> "<<-e2->vector());
-	make_twins(e1,e2);
+	this->make_twins(e1,e2);
 	CGAL_assertion(e1->mark()==e2->mark());
 	
 	// discard temporary sphere_point ?
diff --git a/Nef_3/include/CGAL/Nef_3/SNC_point_locator.h b/Nef_3/include/CGAL/Nef_3/SNC_point_locator.h
index 903a7746cee..38690a6b1e9 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_point_locator.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_point_locator.h
@@ -66,6 +66,7 @@ class SNC_point_locator
 {
  public:
   class Intersection_call_back;
+  typedef SNC_decorator Base;
   typedef SNC_point_locator<SNC_decorator> Self;
   typedef typename SNC_decorator::Decorator_traits Decorator_traits;
   typedef typename SNC_decorator::SNC_structure SNC_structure;
@@ -92,6 +93,7 @@ public:
   typedef typename Decorator_traits::Halfedge_iterator Halfedge_iterator;
   typedef typename Decorator_traits::Halffacet_iterator Halffacet_iterator;
 
+
   const char* version() { return version_; }
 
   virtual Object_handle locate(const Point_3& p) const = 0;
@@ -214,6 +216,7 @@ public:
 
   //  typedef typename SNC_candidate_provider::Objects_around_box Objects_around_box;
 
+  using Base::get_visible_facet;
 public:
   SNC_point_locator_by_spatial_subdivision() : 
     initialized(false), candidate_provider(0) {}
@@ -305,7 +308,7 @@ public:
 
   virtual void initialize(SNC_structure* W) {
 #ifdef CGAL_NEF_LIST_OF_TRIANGLES
-    set_snc(*W);
+    this->set_snc(*W);
     candidate_provider = new SNC_candidate_provider(W);
 #else // CGAL_NEF_LIST_OF_TRIANGLES
     CGAL_NEF_TIMER(ct_t.start());
@@ -317,7 +320,7 @@ public:
 #endif
     CGAL_assertion( W != NULL);
 //    (Base) *this = SNC_decorator(*W);
-	set_snc(*W);
+    this->set_snc(*W);
     Object_list objects;
     Vertex_iterator v;
     Halfedge_iterator e;
diff --git a/Nef_3/include/CGAL/Nef_3/SNC_simplify.h b/Nef_3/include/CGAL/Nef_3/SNC_simplify.h
index 659d06aa619..8960720bfbd 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_simplify.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_simplify.h
@@ -697,6 +697,8 @@ class SNC_simplify<SNC_indexed_items, SNC_structure>
   typedef typename SNC_structure::SHalfedge_around_facet_circulator 
                                   SHalfedge_around_facet_circulator;
 
+  using Base::is_part_of_edge;
+
  public:
   SNC_simplify(SNC_structure& sncs) : Base(sncs) {}
 
diff --git a/Nef_3/include/CGAL/Nef_3/SNC_sphere_map.h b/Nef_3/include/CGAL/Nef_3/SNC_sphere_map.h
index 4f5b012b742..b5435df2993 100644
--- a/Nef_3/include/CGAL/Nef_3/SNC_sphere_map.h
+++ b/Nef_3/include/CGAL/Nef_3/SNC_sphere_map.h
@@ -134,7 +134,7 @@ class SNC_sphere_map : public Items_::template Vertex<SNC_structure<Kernel_, Ite
 
   typedef Vertex_handle       Constructor_parameter;
   typedef Vertex_const_handle Constructor_const_parameter;
-
+  using Base::init_range; // AF add CR
  public:
   SNC_sphere_map(bool construct=false) : Base(), destruct(construct) {
     if(!construct) return;
@@ -228,7 +228,7 @@ class SNC_sphere_map : public Items_::template Vertex<SNC_structure<Kernel_, Ite
     operator Object_handle() const { return Ibase::operator*(); }
     Object_handle& operator*() const { return Ibase::operator*(); }
     Object_handle  operator->() const 
-    { this->CGAL_nef_assertion_msg(0,"not impl."); return Object_handle(); }
+    { CGAL_assertion_msg(0,"not impl."); return Object_handle(); }
   };
 
   class SFace_cycle_const_iterator : public Object_const_iterator 
@@ -259,7 +259,7 @@ class SNC_sphere_map : public Items_::template Vertex<SNC_structure<Kernel_, Ite
     operator Object_handle() const { return Ibase::operator*(); }
     const Object_handle& operator*() const { return Ibase::operator*(); }
     Object_handle  operator->() const 
-    { this->CGAL_nef_assertion_msg(0,"not impl."); return Object_handle(); }
+    { CGAL_assertion_msg(0,"not impl."); return Object_handle(); }
   };
 
   SFace_cycle_const_iterator sface_cycles_begin(SFace_const_handle f) const
diff --git a/Nef_3/include/CGAL/Nef_polyhedron_3.h b/Nef_3/include/CGAL/Nef_polyhedron_3.h
index f42e40a1ce1..24d14399e38 100644
--- a/Nef_3/include/CGAL/Nef_polyhedron_3.h
+++ b/Nef_3/include/CGAL/Nef_polyhedron_3.h
@@ -173,6 +173,9 @@ class Nef_polyhedron_3 : public CGAL::Handle_for< Nef_polyhedron_3_rep<Kernel_,
   typedef typename Kernel::Segment_3                  Segment_3;
   typedef typename Kernel::Aff_transformation_3       Aff_transformation_3;
 
+  //typedef SNC_const_decorator<SNC_structure<Kernel_,Items_,Mark_> > Decorator;
+  //using Decorator::set_snc;
+
   struct Polylines_tag {};
 
   enum Boundary { EXCLUDED=0, INCLUDED=1 };