diff --git a/BGL/include/CGAL/boost/graph/graph_traits_Linear_cell_complex.h b/BGL/include/CGAL/boost/graph/graph_traits_Linear_cell_complex.h
index ef3f515416f..0a02b5ee91c 100644
--- a/BGL/include/CGAL/boost/graph/graph_traits_Linear_cell_complex.h
+++ b/BGL/include/CGAL/boost/graph/graph_traits_Linear_cell_complex.h
@@ -443,7 +443,7 @@ halfedge(typename boost::graph_traits<CGAL_LCC_TYPE>::vertex_descriptor u,
          darts_of_cell<0>(const_cast<CGAL_LCC_TYPE&>(g).template beta<2>(u->dart())).end();*/
        it!=itend; ++it)
   {
-    if (it->template attribute<0>()==v)
+    if (g.template attribute<0>(g.template beta<2>(it))==v)
     {
       return std::make_pair(it, true);
       // return std::make_pair(const_cast<CGAL_LCC_TYPE&>(g).template beta<2>(it), true);
@@ -502,7 +502,7 @@ CGAL_LCC_TEMPLATE_ARGS
 bool is_valid(const CGAL_LCC_TYPE& cm, bool = false)
 {
   // cm.display_darts(std::cout,true);
-  return cm.is_valid(); // true to inverse the convention between darts and 0-attributes
+  return cm.is_valid();
 }
 
 CGAL_LCC_TEMPLATE_ARGS
@@ -534,6 +534,7 @@ void set_target(typename boost::graph_traits<CGAL_LCC_TYPE>::halfedge_descriptor
                 CGAL_LCC_TYPE& cm)
 {
   cm.template restricted_set_dart_attribute<0>(cm.template beta<2>(h1), v);
+  
   // cm.template restricted_set_dart_attribute<0>(h1, v);
   // cm.template set_dart_attribute<0>(h1, v);
 }
diff --git a/BGL/test/BGL/test_Prefix.h b/BGL/test/BGL/test_Prefix.h
index 8706320ccf1..cb570ef2313 100644
--- a/BGL/test/BGL/test_Prefix.h
+++ b/BGL/test/BGL/test_Prefix.h
@@ -16,7 +16,7 @@
 #include <CGAL/boost/graph/graph_traits_Polyhedron_3.h>
 
 #include <CGAL/Linear_cell_complex.h>
-#include <CGAL/Linear_cell_complex_incremental_builder.h>
+#include <CGAL/Linear_cell_complex_incremental_builder_v2.h>
 #include <CGAL/Linear_cell_complex_constructors.h>
 #include <CGAL/boost/graph/graph_traits_Linear_cell_complex.h>
 #include <CGAL/boost/graph/properties_Linear_cell_complex.h>
@@ -146,7 +146,7 @@ bool read_a_mesh(LCC& lcc, const std::string& str) {
   std::ifstream in(str.c_str());
   bool success = in.good();
   if(success)
-    CGAL::load_off(lcc, in);
+    CGAL::load_off_v2(lcc, in);
   return success;
 }
 
diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_v2.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_v2.h
index fd60e0c7ab2..6f0f354bf09 100644
--- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_v2.h
+++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_v2.h
@@ -68,7 +68,7 @@ namespace CGAL {
 
     void add_vertex_to_facet(size_type i)
     {
-      // std::cout<<i<<"  "<<std::flush;
+      std::cout<<"add vertex "<<i<<"  "<<std::flush;
       CGAL_assertion( i<new_vertices );
 
       if ( !begin_face )
@@ -88,7 +88,11 @@ namespace CGAL {
         if (first_dart==lcc.null_handle)
         { first_dart=cur; }
         else
-        { lcc.basic_link_beta_1(prev_dart, cur); }
+        {
+          lcc.basic_link_beta_1(prev_dart, cur);
+          std::cout<<"1-link "<<lcc.darts().index(prev_dart)<<" -> "<<
+                     lcc.darts().index(cur)<<std::endl;
+        }
 
         prev_dart = cur;
       }
@@ -104,13 +108,17 @@ namespace CGAL {
     // End of the facet. Return the first dart of this facet.
     Dart_handle end_facet()
     {
-      // std::cout<<"  end facet."<<std::endl;
       CGAL_assertion( first_dart!=lcc.null_handle &&
                       prev_dart!=lcc.null_handle );
 
       add_vertex_to_facet(first_vertex);
       lcc.basic_link_beta_1(prev_dart, first_dart);
       face_attrib=NULL;
+
+      std::cout<<"1-link "<<lcc.darts().index(prev_dart)<<" -> "<<
+                 lcc.darts().index(first_dart)<<std::endl;
+
+       std::cout<<"  end facet."<<std::endl;
       return first_dart;
     }
 
@@ -129,7 +137,8 @@ namespace CGAL {
     // End of the surface. Return one dart of the created surface.
     Dart_handle end_surface()
     {
-      unsigned int nb=0;
+ /*  TODO NOT NEEDED ?
+     unsigned int nb=0;
 
       for (typename LCC::Dart_range::iterator it=lcc.darts().begin(),
            itend=lcc.darts().end(); it!=itend; ++it)
@@ -150,7 +159,7 @@ namespace CGAL {
           lcc.template set_dart_of_attribute<0>(lcc.vertex_attribute(it), it);
           ++nb;
         }
-      }
+      }*/
 
       return first_dart;
     }