diff --git a/EGkArcSpecial.h b/EGkArcSpecial.h
index eacde5f..2f9237e 100644
--- a/EGkArcSpecial.h
+++ b/EGkArcSpecial.h
@@ -1,13 +1,13 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2014-2015
+//  EgalTech 2014-2022
 //----------------------------------------------------------------------------
-// File : EGkArcSpecial.h       Data : 15.03.15         Versione : 1.6c2
+// File : EGkArcSpecial.h       Data : 20.12.22         Versione : 2.4l3
 // Contenuto : Dichiarazione funzioni per calcolo speciale archi.
 //
 //
 //
 // Modifiche : 12.06.14 DS Creazione modulo.
-//
+//             20.12.22 DS Aggiunta GetArc2PCN.
 //
 //----------------------------------------------------------------------------
 
@@ -28,3 +28,4 @@
 EGK_EXPORT ICurve* GetArc2PD( const Point3d& ptStart, const Point3d& ptEnd, double dDirStartDeg) ;
 EGK_EXPORT ICurve* GetArc2PVN( const Point3d& ptStart, const Point3d& ptEnd, const Vector3d& vtDirS, const Vector3d& vtN) ;
 EGK_EXPORT ICurve* GetArc3P( const Point3d& ptStart, const Point3d& ptOther, const Point3d& ptEnd, bool bCirc) ;
+EGK_EXPORT ICurveArc* GetArc2PCN( const Point3d& ptStart, const Point3d& ptEnd, const Point3d& ptNearCen, const Vector3d& vtN) ;