diff --git a/vcg/complex/algorithms/parametrization/tangent_field_operators.h b/vcg/complex/algorithms/parametrization/tangent_field_operators.h
index 0b4474fa..28f557f9 100644
--- a/vcg/complex/algorithms/parametrization/tangent_field_operators.h
+++ b/vcg/complex/algorithms/parametrization/tangent_field_operators.h
@@ -88,7 +88,7 @@ vcg::Point3<ScalarType> InterpolateNRosy3D(const std::vector<vcg::Point3<ScalarT
                                            const vcg::Point3<ScalarType> &TargetN)
 {
     typedef typename vcg::Point3<ScalarType> CoordType;
-    ///create a reference frame along TargetN
+    //create a reference frame along TargetN
     CoordType TargetZ=TargetN;
     TargetZ.Normalize();
     CoordType U=CoordType(1,0,0);
@@ -124,6 +124,13 @@ vcg::Point3<ScalarType> InterpolateNRosy3D(const std::vector<vcg::Point3<ScalarT
 
         ///trassform to the reference frame
         rotV=RotFrame*rotV;
+//        if (isnan(rotV.X())||isnan(rotV.Y()))
+//        {
+//            std::cout << "V[i] " << V[i].X() << " " << V[i].Y() << std::endl << std::flush;
+//            std::cout << "Norm[i] " << Norm[i].X() << " " << Norm[i].Y() << " " << Norm[i].Z()<< std::endl;
+//            std::cout << "TargetN " << TargetN.X() << " " << TargetN.Y() << " " << TargetN.Z()<< std::endl<< std::flush;
+//        }
+
         assert(!isnan(rotV.X()));
         assert(!isnan(rotV.Y()));
 
@@ -526,9 +533,9 @@ public:
     static void InitBorderField(MeshType & mesh)
     {
         typedef typename MeshType::FaceType FaceType;
-        typedef typename MeshType::VertexType VertexType;
+//        typedef typename MeshType::VertexType VertexType;
         typedef typename MeshType::CoordType CoordType;
-        typedef typename MeshType::ScalarType ScalarType;
+//        typedef typename MeshType::ScalarType ScalarType;
 
         vcg::tri::UpdateTopology<MeshType>::FaceFace(mesh);
         for (size_t i=0;i<mesh.face.size();i++)
@@ -553,7 +560,7 @@ public:
     {
 
         typedef typename MeshType::FaceType FaceType;
-        typedef typename MeshType::VertexType VertexType;
+        //typedef typename MeshType::VertexType VertexType;
         typedef typename MeshType::CoordType CoordType;
         typedef typename MeshType::ScalarType ScalarType;