diff --git a/libsrc/csg/splinesurface.cpp~ b/libsrc/csg/splinesurface.cpp~
deleted file mode 100644
index 1f6605dd..00000000
--- a/libsrc/csg/splinesurface.cpp~
+++ /dev/null
@@ -1,92 +0,0 @@
-
-#include <csg.hpp>
-#include <mystdlib.h>
-#include "splinesurface.hpp"
-
-
-namespace netgen
-{
-SplineSurface :: SplineSurface() : OneSurfacePrimitive()
-{ ; }
-
-SplineSurface :: ~SplineSurface() { ; }
-
-void SplineSurface :: AppendPoint(const Point<3> & p, const double reffac, const bool hpref)
-{
-  geompoints.Append(GeomPoint<3>(p,reffac));
-  geompoints.Last().hpref = hpref;
-}
-
-double SplineSurface :: CalcFunctionValue (const Point<3> & point) const
-{
-  auto v1 = splines[0]->GetTangent(0);
-  auto v2 = splines.Last()->GetTangent(1);
-  auto p1 = splines[0]->GetPoint(0);
-  auto n = Cross(v1,v2);
-  n.Normalize();
-  return n * (point-p1);
-}
-
-void SplineSurface :: CalcGradient (const Point<3> & point, Vec<3> & grad) const
-{
-  auto v1 = splines[0]->GetTangent(0);
-  auto v2 = splines.Last()->GetTangent(1);
-  auto p1 = splines[0]->GetPoint(0);
-  grad = Cross(v1,v2);
-  grad.Normalize();
-}
-
-  double SplineSurface :: HesseNorm() const
-{
-  return 0;
-}
-
-  Point<3> SplineSurface :: GetSurfacePoint() const
-{
-  return splines[0]->GetPoint(0);
-}
-
-  void SplineSurface :: Print(ostream & str) const
-{
-  str << "SplineSurface " << endl;
-}
-
-INSOLID_TYPE SplineSurface :: BoxInSolid(const BoxSphere<3> & box) const
-{
-
-int i;
-double val;
-
-
-    val = CalcFunctionValue (box.Center());
-    if (val > box.Diam() / 2) return IS_OUTSIDE;
-    if (val < -box.Diam() / 2) return IS_INSIDE;
-
-Vec<3> n = GetNormalVector(box.Center());
-double cx = n[0];
-double cy = n[1];
-double cz = n[2];
-
-    if (val > 0)
-      {
-        Vec<3> vdiag = box.PMax() - box.PMin();
-        double modify = (vdiag(0) * fabs (cx) + 
-                         vdiag(1) * fabs (cy) + 
-                         vdiag(2) * fabs (cz) ) / 2;
-
-        if (val - modify < 0)
-          return DOES_INTERSECT;
-        return IS_OUTSIDE;
-      }
-    else
-      {
-        Vec<3> vdiag = box.PMax() - box.PMin();
-        double modify =  (vdiag(0) * fabs (cx) + 
-                          vdiag(1) * fabs (cy) + 
-                          vdiag(2) * fabs (cz) ) / 2;
-        if (val + modify > 0)
-          return DOES_INTERSECT;
-        return IS_INSIDE;
-}
-}
-}
diff --git a/libsrc/csg/splinesurface.hpp~ b/libsrc/csg/splinesurface.hpp~
deleted file mode 100644
index 2f4127a0..00000000
--- a/libsrc/csg/splinesurface.hpp~
+++ /dev/null
@@ -1,46 +0,0 @@
-#ifndef FILE_SPLINESURFACE
-#define FILE_SPLINESURFACE
-
-
-namespace netgen
-{
-  class SplineSurface : public OneSurfacePrimitive
-  {
-  protected:
-    Array<GeomPoint<3>> geompoints;
-    Array<SplineSeg<3>*> splines;
-    Array<string*> bcnames;
-    
-  public:
-    SplineSurface();
-    virtual ~SplineSurface();
-    
-    const Array<SplineSeg<3>*> & GetSplines() const { return splines; }
-    int GetNSplines() const { return splines.Size(); }
-    string GetSplineType(const int i) const { return splines[i]->GetType(); }
-    SplineSeg<3> & GetSpline(const int i) { return *splines[i]; }
-    const SplineSeg<3> & GetSpline(const int i) const { return *splines[i]; }
-    int GetNP() const { return geompoints.Size(); }
-    const GeomPoint<3> & GetPoint(int i) const { return geompoints[i]; }
-    
-    DLL_HEADER void AppendPoint(const Point<3> & p, const double reffac = 1., const bool hpref=false);
-    void AppendSegment(SplineSeg<3>* spline, string* bcname);
-    Array<Plane*>* CreatePlanes() const;
-    
-    virtual double CalcFunctionValue (const Point<3> & point) const;
-    virtual void CalcGradient (const Point<3> & point, Vec<3> & grad) const;
-    virtual double HesseNorm () const;
-    virtual Point<3> GetSurfacePoint () const;
-    virtual void CalcSpecialPoints(Array<Point<3>> & pts) const;
-
-    virtual INSOLID_TYPE BoxInSolid(const BoxSphere<3> & box) const;
-    
-    
-    virtual void Print (ostream & str) const;
-    
-    
-  };
-
-}
-
-#endif