diff --git a/EGkVolZmap.h b/EGkVolZmap.h
index 0a663a5..587d107 100644
--- a/EGkVolZmap.h
+++ b/EGkVolZmap.h
@@ -94,6 +94,7 @@ class __declspec( novtable) IVolZmap : public IGeoObj
       virtual bool AddSurfTm( const ISurfTriMesh* pStm) = 0 ;
       virtual bool SubtractSurfTm( const ISurfTriMesh* pStm) = 0 ;
       virtual bool MakeUniform( double dToler, bool bIsExtensionFirst = true, int nToolNum = 0) = 0 ;
+      virtual bool EraseFins( const Vector3d& vtDir, double dThick) = 0 ;
       virtual bool Offset( double dOffs, int nType) = 0 ;
 } ;
 
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 18185a3..fbc930c 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -748,6 +748,7 @@ EXE_EXPORT bool ExeCutVolZmapPlane( int nId, const Point3d& ptOn, const Vector3d
 EXE_EXPORT bool ExeUpdateVolZmapByAddingSurfTm( int nVolZmapId, int nStmId) ;
 EXE_EXPORT bool ExeUniformVolZmap( int nVolZmapId, double dToler, bool bExtensionFirst, int nToolNum) ;
 EXE_EXPORT bool ExeVolZMapOffset( int nId, double dDist, int nType) ;
+EXE_EXPORT bool ExeVolZMapEraseFins( int nVolZMapId, const Vector3d& vtDir, double dThick) ;
 
 // GeomDB Get
 EXE_EXPORT bool ExeTextNormVersor( int nId, int nRefId, Vector3d& vtNorm) ;