diff --git a/EXE_GdbModifySurf.cpp b/EXE_GdbModifySurf.cpp
index b3588da..d9b4426 100644
--- a/EXE_GdbModifySurf.cpp
+++ b/EXE_GdbModifySurf.cpp
@@ -368,6 +368,32 @@ ExeSurfFrOffset( int nId, double dDist, int nType)
    return bOk ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeSurfFrOffsetAdv( int nId, double dDist, int nType, int& nNewId)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+  // recupero la superficie FlatRegion
+   ISurfFlatRegion* pSfr = GetSurfFlatRegion( pGeomDB->GetGeoObj( nId)) ;
+   if ( pSfr == nullptr)
+      return false ;      
+  // eseguo l'offset
+   PtrOwner<ISurfFlatRegion> pSfrOffs( pSfr->CreateOffsetSurf( dDist, nType)) ;
+   if ( IsNull( pSfrOffs))
+      return false ;
+  // salvo la superficie di offset
+   nNewId = GDB_ID_NULL ;
+   if ( pSfr->GetChunkCount() > 0) {
+     // inserisco nel DB geometrico
+      nNewId = pGeomDB->InsertGeoObj( GDB_ID_NULL, nId, GDB_AFTER, Release( pSfrOffs)) ;
+     // copio gli attributi
+      pGeomDB->CopyAttributes( nId, nNewId) ;
+      ExeSetModified() ;
+   }
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 bool
 ExeSurfFrMoveSimpleNoCollision( int nId1, int nId2, const Vector3d& vtDir, double& dLen, int nRefType)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 0edd859..095266c 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbModifySurf.cpp b/LUA_GdbModifySurf.cpp
index f436085..5acf8d8 100644
--- a/LUA_GdbModifySurf.cpp
+++ b/LUA_GdbModifySurf.cpp
@@ -141,6 +141,29 @@ LuaSurfFrOffset( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaSurfFrOffsetAdv( lua_State* L)
+{
+  // 3 parametri : Id, dDist, nType
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   double dDist ;
+   LuaCheckParam( L, 2, dDist)
+   int nType = ICurve::OFF_FILLET ;
+   LuaGetParam( L, 3, nType) ;
+   LuaClearStack( L) ;
+  // eseguo l'offset della regione
+   int nNewId = GDB_ID_NULL ;
+   bool bOk = ExeSurfFrOffsetAdv( nId, dDist, nType, nNewId) ;
+   if ( bOk) 
+      LuaSetParam( L, nNewId) ;
+   else
+      LuaSetParam( L) ;
+
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaSurfTmMoveVertex( lua_State* L)
@@ -451,6 +474,7 @@ LuaInstallGdbModifySurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrSubtract", LuaSurfFrSubtract) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrIntersect", LuaSurfFrIntersect) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrOffset", LuaSurfFrOffset) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfFrOffsetAdv", LuaSurfFrOffsetAdv) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmMoveVertex", LuaSurfTmMoveVertex) ;  
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmToTriangles", LuaSurfTmToTriangles) ;  
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmRemoveFacet", LuaSurfTmRemoveFacet) ;