diff --git a/EGkSurfTriMesh.h b/EGkSurfTriMesh.h
index 2cadb46..0f20b31 100644
--- a/EGkSurfTriMesh.h
+++ b/EGkSurfTriMesh.h
@@ -1,7 +1,7 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2014-2021
+//  EgalTech 2014-2022
 //----------------------------------------------------------------------------
-// File : EGkSurfTriMesh.h      Data : 26.09.21          Versione : 2.3i2
+// File : EGkSurfTriMesh.h      Data : 10.10.22          Versione : 2.4i4
 // Contenuto : Dichiarazione della interfaccia ISurfTriMesh.
 //
 //
@@ -82,6 +82,7 @@ class __declspec( novtable) ISurfTriMesh : public ISurf
       virtual bool GetVertexSmoothNormal( int nV, int nT, Vector3d& vtN) const = 0 ;
       virtual bool GetTriangleBoundaryEdges( int nId, TriFlags3d& TFlags) const = 0 ;
       virtual bool GetTriangleSmoothNormals( int nId, TriNormals3d& TNrms) const = 0 ;
+      virtual ISurfTriMesh* CloneTriangle( int nTria) const = 0 ;
       virtual bool GetLoops( POLYLINEVECTOR& vPL) const = 0 ;
       virtual bool GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR& vPL) const = 0 ;
       virtual int  GetFacetCount( void) const = 0 ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 1d88813..d4f6602 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -515,6 +515,7 @@ EXE_EXPORT bool ExeChangeClosedCurveStart( int nId, double dU) ;
 EXE_EXPORT bool ExeChangeClosedCurveStartPoint( int nId, const Point3d& ptP, int nRefType) ;
 EXE_EXPORT bool ExeModifyCurveStartPoint( int nId, const Point3d& ptP, int nRefType) ;
 EXE_EXPORT bool ExeModifyCurveEndPoint( int nId, const Point3d& ptP, int nRefType) ;
+EXE_EXPORT bool ExeSpiralizeCurve( int nId, double dDelta) ;
 EXE_EXPORT bool ExeModifyCurveExtrusion( const INTVECTOR& vIds, const Vector3d& vtExtr, int nRefType) ;
 EXE_EXPORT bool ExeModifyCurveThickness( const INTVECTOR& vIds, double dThick) ;
 EXE_EXPORT bool ExeTrimCurveStartAtLen( int nId, double dLen) ;
@@ -569,6 +570,7 @@ EXE_EXPORT bool ExeSurfFrIntersect( int nId1, int nId2) ;
 EXE_EXPORT bool ExeSurfFrOffset( int nId, double dDist, int nType) ;
 EXE_EXPORT bool ExeSurfFrMoveSimpleNoCollision( int nId1, int nId2, const Vector3d& vtDir, double& dLen, int nRefType) ;
 EXE_EXPORT bool ExeSurfFrRotateSimpleNoCollision( int nId1, int nId2, const Point3d& ptCen, double& dAngDeg, int nRefType) ;
+EXE_EXPORT int  ExeSurfTmToTriangles( int nId, int* pnCount) ;
 EXE_EXPORT bool ExeSurfTmRemoveFacet( int nId, int nFacet) ;
 EXE_EXPORT bool ExeSurfTmSwapFacets( int nId, int nFacet1, int nFacet2) ;
 EXE_EXPORT bool ExeSurfTmRemovePart( int nId, int nPart) ;
diff --git a/EgtKeyCodes.h b/EgtKeyCodes.h
index 849565a..2245c30 100644
--- a/EgtKeyCodes.h
+++ b/EgtKeyCodes.h
@@ -23,7 +23,7 @@
 
 //----------------------------------------------------------------------------
 const int KEY_BASELIB_PROD = 207 ;
-const int KEY_BASELIB_VER = 2409 ;
+const int KEY_BASELIB_VER = 2410 ;
 const int KEY_BASELIB_LEV = 1 ;
 
 //----------------------------------------------------------------------------