diff --git a/vcg/complex/algorithms/stat.h b/vcg/complex/algorithms/stat.h
index c9b0e7cb..14a6d8fd 100644
--- a/vcg/complex/algorithms/stat.h
+++ b/vcg/complex/algorithms/stat.h
@@ -250,7 +250,7 @@ public:
     return V;
   }
 
-  static ScalarType ComputeMeshVolume(const MeshType & m)
+  static ScalarType ComputeMeshVolume(MeshType & m)
   {
     Inertia<MeshType> I(m);
     return I.Mass();
diff --git a/vcg/complex/allocate.h b/vcg/complex/allocate.h
index ee96b2c9..72b9255e 100644
--- a/vcg/complex/allocate.h
+++ b/vcg/complex/allocate.h
@@ -2049,7 +2049,7 @@ public:
   }
 
   template <class ATTR_TYPE>
-  static typename MeshType::template ConstPerTetraAttributeHandle<ATTR_TYPE> FindPerTetraAttribute(MeshType &m, const std::string &name)
+  static typename MeshType::template ConstPerTetraAttributeHandle<ATTR_TYPE> FindPerTetraAttribute(const MeshType &m, const std::string &name)
   {
     if(!name.empty()){
       PointerToAttribute h1;
diff --git a/vcg/simplex/tetrahedron/component.h b/vcg/simplex/tetrahedron/component.h
index cb1a6e87..9ba9d0ed 100644
--- a/vcg/simplex/tetrahedron/component.h
+++ b/vcg/simplex/tetrahedron/component.h
@@ -48,7 +48,7 @@ template <class T> class EmptyCore : public T {
 public:
     //Empty vertexref
     inline typename T::VertexType *       & V( const int  )      {	assert(0);		static typename T::VertexType *vp=0; return vp; }
-    inline typename T::VertexType * const & V( const int ) const {	assert(0);		static typename T::VertexType *vp=0; return vp; }
+    inline const typename T::VertexType *   V( const int ) const {	assert(0);		static typename T::VertexType *vp=0; return vp; }
     inline const typename T::VertexType *  cV( const int ) const {	assert(0);		static typename T::VertexType *vp=0; return vp;	}
     inline       typename T::CoordType & P( const int )          {	assert(0);		static typename T::CoordType coord(0, 0, 0); return coord;	}
     inline const typename T::CoordType & P( const int )    const {	assert(0);		static typename T::CoordType coord(0, 0, 0); return coord;	}
@@ -181,7 +181,8 @@ public:
     typedef typename T::VertexType::ScalarType ScalarType;
 
     inline       typename T::VertexType *       & V( const int j )  { assert(j>=0 && j<4); return v[j]; }
-    inline const typename T::VertexType *        cV( const int j )  { assert(j>=0 && j<4); return v[j]; }
+    inline const typename T::VertexType *         V( const int j ) const { assert(j>=0 && j<4); return v[j]; }
+    inline const typename T::VertexType *        cV( const int j ) const { assert(j>=0 && j<4); return v[j]; }
 
     inline  size_t cFtoVi (const int f, const int j) const { assert(f >= 0 && f < 4); assert(j >= 0 && j < 3); return findices[f][j]; }
 
@@ -457,7 +458,8 @@ public:
     typename T::TetraPointer const cVTp( const int j ) const { assert( j >= 0 && j < 4 ); return _vtp[j]; }
 
     char & VTi( const int j ) { return _vti[j]; }
-    const char & cVTi( const int j ) const { return _vti[j]; }
+    char   VTi( const int j ) const { return _vti[j]; }
+    char  cVTi( const int j ) const { return _vti[j]; }
 
     static bool HasVTAdjacency() { return true; }
     static bool HasVTAdjacencyOcc() { return false; }
diff --git a/vcg/simplex/vertex/component.h b/vcg/simplex/vertex/component.h
index 37f27f93..251e3786 100644
--- a/vcg/simplex/vertex/component.h
+++ b/vcg/simplex/vertex/component.h
@@ -572,6 +572,7 @@ public:
     typename T::TetraPointer &VTp()       { return _tp; }
     typename T::TetraPointer cVTp() const { return _tp; }
     int &VTi() {return _zp; }
+    int  VTi() const { return _zp; }
     int cVTi() const { return _zp; }
     static bool HasVTAdjacency() { return true; }
     static void Name( std::vector< std::string > & name ) { name.push_back( std::string("VTAdj") ); T::Name(name); }