diff --git a/EGkCurveAux.h b/EGkCurveAux.h
index 8fc8ac5..2e24828 100644
--- a/EGkCurveAux.h
+++ b/EGkCurveAux.h
@@ -74,7 +74,7 @@ EGK_EXPORT ICurve* ApproxBezierWithCubics( const ICurve* pCrv, double dTol) ;
 
 //----------------------------------------------------------------------------
 //! Approssima una bezier con una serie di bezier cubiche
-EGK_EXPORT ICurveBezier* ApproxArcCurveBezierWithSingleCubic( const ICurve* pCrv, const Point3d& ptCen) ;
+EGK_EXPORT ICurveBezier* ApproxArcCurveBezierWithSingleCubic( const ICurve* pCrv, const Point3d& ptCen, const Vector3d& vtN) ;
 
 //----------------------------------------------------------------------------
 //! Campiona una serie di punti dalla curva e li approssima con una o pił curve di bezier
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 6767b16..dcd23cd 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -319,7 +319,7 @@ EXE_EXPORT int  ExeCreateCurveChamfer( int nParentId, int nCrv1, const Point3d&
 EXE_EXPORT int  ExeCreateCurveBezier( int nParentId, int nDegree, const PNTVECTOR& vPnt, int nRefType) ;
 EXE_EXPORT int  ExeCreateCurveBezierRational( int nParentId, int nDegree, const PNTUVECTOR& vPntW, int nRefType) ;
 EXE_EXPORT int  ExeCreateCurveBezierFromArc( int nParentId, int nArcId, bool bErase) ;
-EXE_EXPORT int  ExeCreateCurveBezierFromCurve( int nParentId, int nCrvId, int nDeg) ;
+EXE_EXPORT int  ExeCreateCurveBezierFromCurve( int nParentId, int nCrvId, bool bRational = true) ;
 EXE_EXPORT int  ExeCreateCurveCompo( int nParentId, const INTVECTOR& vIds, bool bErase) ;
 EXE_EXPORT int  ExeCreateCurveCompoByChain( int nParentId, const INTVECTOR& vIds,
                                             const Point3d& ptNear, bool bErase, int nRefType, int* pnCount) ;