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/EGkCurveComposite.h b/EGkCurveComposite.h
index 11144d7..48b90ec 100644
--- a/EGkCurveComposite.h
+++ b/EGkCurveComposite.h
@@ -94,7 +94,19 @@ inline ICurveComposite* ConvertCurveToComposite( IGeoObj* pGObj)
                     delete pGObj ;
                     return nullptr ;
                  }
-                 pCrvCo->AddCurve( static_cast<ICurve*>( pGObj)) ;
+                 ICurve* pCrv = static_cast<ICurve*>( pGObj) ;
+                 Vector3d vtExtr ;
+                 if ( pCrv->GetExtrusion( vtExtr)  &&  ! vtExtr.IsSmall())
+                    pCrvCo->SetExtrusion( vtExtr) ;
+                 double dThick ;
+                 if ( pCrv->GetThickness( dThick)  &&  abs( dThick) > EPS_SMALL)
+                    pCrvCo->SetThickness( dThick) ;
+                 for ( int i = 0 ; i < 2 ; ++ i) {
+                    int nProp = pCrv->GetTempProp( i) ;
+                    if ( nProp != 0)
+                       pCrvCo->SetTempProp( nProp, i) ;
+                 }
+                 pCrvCo->AddCurve( pCrv) ;
                  return pCrvCo ;
                }
 
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,
diff --git a/EgtKeyCodes.h b/EgtKeyCodes.h
index 8a7f9a0..b19d875 100644
--- a/EgtKeyCodes.h
+++ b/EgtKeyCodes.h
@@ -24,7 +24,7 @@
 
 //----------------------------------------------------------------------------
 const int KEY_BASELIB_PROD = 207 ;
-const int KEY_BASELIB_VER = 2507 ;
+const int KEY_BASELIB_VER = 2508 ;
 const int KEY_BASELIB_LEV = 1 ;
 
 //----------------------------------------------------------------------------