diff --git a/EGkArcSpecial.h b/EGkArcSpecial.h
index 2f9237e..941388a 100644
--- a/EGkArcSpecial.h
+++ b/EGkArcSpecial.h
@@ -1,13 +1,14 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2014-2022
+//  EgalTech 2014-2023
 //----------------------------------------------------------------------------
-// File : EGkArcSpecial.h       Data : 20.12.22         Versione : 2.4l3
+// File : EGkArcSpecial.h       Data : 04.08.23         Versione : 2.5h1
 // Contenuto : Dichiarazione funzioni per calcolo speciale archi.
 //
 //
 //
 // Modifiche : 12.06.14 DS Creazione modulo.
 //             20.12.22 DS Aggiunta GetArc2PCN.
+//             04.08.23 DS Aggiunta GetArc2PNB.
 //
 //----------------------------------------------------------------------------
 
@@ -27,5 +28,6 @@
 //----------------------------------------------------------------------------
 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* GetArc2PNB( const Point3d& ptStart, const Point3d& ptEnd, const Vector3d& vtN, double dBulge) ;
 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) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 93fe0cc..e997a69 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -266,6 +266,8 @@ EXE_EXPORT int  ExeCreateArcC2PEx( int nParentId, const Point3d& ptCen,
                                    const Point3d& ptNearEnd, int nRefType) ;
 EXE_EXPORT int  ExeCreateArc3P( int nParentId, const Point3d& ptP1,
                                 const Point3d& ptP2, const Point3d& ptP3, int nRefType) ;
+EXE_EXPORT int  ExeCreateArc2PB( int nParentId, const Point3d& ptStart, const Point3d& ptEnd,
+                                 double dBulge, int nRefType) ;
 EXE_EXPORT int  ExeCreateArc2PD( int nParentId, const Point3d& ptStart, const Point3d& ptEnd,
                                  double dDirSDeg, int nRefType) ;
 EXE_EXPORT int  ExeCreateArc2PDEx( int nParentId, const Point3d& ptStart,