diff --git a/EGkSurfTriMesh.h b/EGkSurfTriMesh.h
index a112e46..a10569c 100644
--- a/EGkSurfTriMesh.h
+++ b/EGkSurfTriMesh.h
@@ -16,6 +16,7 @@
 #include "/EgtDev/Include/EGkSurf.h"
 #include "/EgtDev/Include/EGkTriangle3d.h"
 #include "/EgtDev/Include/EGkPolyLine.h"
+#include "/EgtDev/Include/EGkCurve.h"
 
 //----------------------------------------------------------------------------
 const int SVT_NULL = - 1 ;           // vertice o triangolo nullo
@@ -90,6 +91,7 @@ class __declspec( novtable) ISurfTriMesh : public ISurf
       virtual bool GetFacetsContact( int nF1, int nF2, bool& bAdjac, Point3d& ptP1, Point3d& ptP2, double& dAng) const = 0 ;
       virtual ISurfTriMesh* CloneFacet( int nF) const = 0 ;
       virtual bool Cut( const Plane3d& plPlane, bool bSaveOnEq) = 0 ;
+      virtual bool GeneralizedCut( const ICurve& cvCurve, bool bSaveOnEq) = 0 ;
       virtual bool GetAllTriaOverlapBox( const BBox3d& b3Box, INTVECTOR& vT) const = 0 ;
       virtual const BBox3d& GetAllTriaBox( void) const = 0 ;
       virtual int GetPartCount( void) const = 0 ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index d9b51d2..519e39c 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -487,6 +487,7 @@ EXE_EXPORT int  ExeGetSurfTmSilhouette( int nId, const Vector3d& vtDir, int nDes
 EXE_EXPORT int  ExeExtractSurfTmFacetLoops( int nId, int nFacet, int nDestGrpId, int* pnCount) ;
 EXE_EXPORT int  ExeCopySurfTmFacet( int nId, int nFacet, int nDestGrpId) ;
 EXE_EXPORT bool ExeCutSurfTmPlane( int nId, const Point3d& ptOn, const Vector3d& vtN, bool bSaveOnEq, int nRefType) ;
+EXE_EXPORT bool ExeCutSurfTmClosedCurve( int nSurfId, int nCurveId, bool bSaveOnEq) ;
 
 // GeomDb Volume Modify
 EXE_EXPORT int  ExeExplodeVolume( int nId, int* pnCount) ;