diff --git a/EXE_GdbCreateSurf.cpp b/EXE_GdbCreateSurf.cpp
index 9bda430..ad7468f 100644
--- a/EXE_GdbCreateSurf.cpp
+++ b/EXE_GdbCreateSurf.cpp
@@ -1384,6 +1384,42 @@ ExeCreateSurfTmBySewing( int nParentId, const INTVECTOR& vIds, bool bErase)
    return nNewId ;
 }
 
+//----------------------------------------------------------------------------
+int
+ExeCreateSurfTmBySurfBezier( int nParentId, int nSbezId)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+   nParentId = AdjustId( nParentId) ;
+  // recupero la superficie di Bezier
+   const ISurfBezier* pSbez = GetSurfBezier( pGeomDB->GetGeoObj( nSbezId)) ;
+   bool bOk = ( pSbez != nullptr) ;
+  // recupero il riferimento della superficie sorgente
+   Frame3d frSou ;
+   bOk = bOk && pGeomDB->GetGlobFrame( nSbezId, frSou) ;
+  // recupero il riferimento locale
+   Frame3d frLoc ;
+   bOk = bOk && pGeomDB->GetGroupGlobFrame( nParentId, frLoc) ;
+  // copio la superficie ausiliaria della Bezier
+   const ISurfTriMesh* pAuxSurf = ( bOk ? pSbez->GetAuxSurf() : nullptr) ;
+   PtrOwner<ISurfTriMesh> pStm( pAuxSurf != nullptr ? pAuxSurf->Clone() : nullptr) ;
+   bOk = bOk && ! IsNull( pStm) ;
+  // la porto nel riferimento destinazione
+   pStm->LocToLoc( frSou, frLoc) ;
+  // inserisco la superficie trimesh nel DB
+   int nNewId = ( bOk ? pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pStm)) : GDB_ID_NULL) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtSurfTmBySurfBezier(" + IdToString( nParentId) + "," +
+                                               IdToString( nSbezId) + ")" +
+                    " -- Id=" + ToString( nNewId) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+  // restituisco il risultato
+   return nNewId ;
+}
+
 //----------------------------------------------------------------------------
 int
 ExeCreateSurfTmByVolZmap( int nParentId, int nZmapId, int nPart)
diff --git a/EXE_GdbGetSurf.cpp b/EXE_GdbGetSurf.cpp
index 096db76..97fff24 100644
--- a/EXE_GdbGetSurf.cpp
+++ b/EXE_GdbGetSurf.cpp
@@ -914,6 +914,8 @@ ExeSurfBezierGetPointD1( int nSurfId, double dU, double dV, int nUsd, int nVsd,
       string sLua = "EgtSurfBezierGetPointD1(" + ToString( nSurfId) + "," +
                                                  ToString( dU) + "," +
                                                  ToString( dV) + "," +
+                                                 ToString( nUsd) + "," +
+                                                 ToString( nVsd) + "," +
                                                  ToString( nRefId) + ")" +
                     " -- Pnt=" + ( bOk ? "{" + ToString( ptP) + "}" : "nil") +
                     " DerU=" + ( bOk ? "{" + ToString( vtDerU) + "}" : "nil") +
@@ -949,6 +951,8 @@ ExeSurfBezierGetPointNrmD1( int nSurfId, double dU, double dV, int nUsd, int nVs
       string sLua = "EgtSurfBezierGetPointNrmD1(" + ToString( nSurfId) + "," +
                                                     ToString( dU) + "," +
                                                     ToString( dV) + "," +
+                                                    ToString( nUsd) + "," +
+                                                    ToString( nVsd) + "," +
                                                     ToString( nRefId) + ")" +
                     " -- Pnt=" + ( bOk ? "{" + ToString( ptP) + "}" : "nil") +
                     " Nrm=" + ( bOk ? "{" + ToString( vtN) + "}" : "nil") +
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 9273558..36228c3 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbCreateSurf.cpp b/LUA_GdbCreateSurf.cpp
index 4e29eab..d75cee8 100644
--- a/LUA_GdbCreateSurf.cpp
+++ b/LUA_GdbCreateSurf.cpp
@@ -673,6 +673,26 @@ LuaCreateSurfTmBySewing( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaCreateSurfTmBySurfBezier( lua_State* L)
+{
+  // 2 parametri : ParentId, nSbezId
+   int nParentId ;
+   LuaCheckParam( L, 1, nParentId)
+   int nZmapId ;
+   LuaCheckParam( L, 2, nZmapId)
+   LuaClearStack( L) ;
+  // creo STM partendo da superficie di Bezier
+   int nId = ExeCreateSurfTmBySurfBezier( nParentId, nZmapId) ;
+  // restituisco il risultato
+   if ( nId != GDB_ID_NULL)
+      LuaSetParam( L, nId) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaCreateSurfTmByVolZmap( lua_State* L)
@@ -793,6 +813,7 @@ LuaInstallGdbCreateSurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmRuled", LuaCreateSurfTmRuled) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmByTriangles", LuaCreateSurfTmByTriangles) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmBySewing", LuaCreateSurfTmBySewing) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmBySurfBezier", LuaCreateSurfTmBySurfBezier) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmByVolZmap", LuaCreateSurfTmByVolZmap) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezier", LuaCreateSurfBezier) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezierRat", LuaCreateSurfBezierRational) ;