diff --git a/EXE_GdbCreateSurf.cpp b/EXE_GdbCreateSurf.cpp
index 7cc0965..56971ba 100644
--- a/EXE_GdbCreateSurf.cpp
+++ b/EXE_GdbCreateSurf.cpp
@@ -222,7 +222,7 @@ ExeCreateSurfFrDisk( int nParentId, const Point3d& ptOrig, double dRad, int nRef
 
 //-------------------------------------------------------------------------------
 int
-ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquared)
+ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquaredEnds, bool bSquaredMids)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
@@ -245,7 +245,7 @@ ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquared)
   // eseguo la trasformazione (viene eseguita solo se i riferimenti sono diversi
    pCopCrv->LocToLoc( frCrv, frLoc) ;
   // creo la regione
-   PtrOwner<ISurfFlatRegion> pSfr( GetSurfFlatRegionFromFatCurve( Release( pCopCrv), dRad, bSquared, bSquared)) ;
+   PtrOwner<ISurfFlatRegion> pSfr( GetSurfFlatRegionFromFatCurve( Release( pCopCrv), dRad, bSquaredEnds, bSquaredMids)) ;
    bOk = bOk && ! IsNull( pSfr) ;
   // inserisco la superficie nel DB
    int nNewId = ( bOk ? pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pSfr)) : GDB_ID_NULL) ;
@@ -255,7 +255,8 @@ ExeCreateSurfFrFatCurve( int nParentId, int nCrvId, double dRad, bool bSquared)
       string sLua = "EgtSurfFrFatCurve(" + IdToString( nParentId) + "," +
                                            ToString( nCrvId) + "," +
                                            ToString( dRad) + "," +
-                                           ToString( bSquared) + ")" +
+                                           ToString( bSquaredEnds) + "," +
+                                           ToString( bSquaredMids) + ")" +
                     " -- Id=" + ToString( nNewId) ;
       LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
    }
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 28592bb..41809a5 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbCreateSurf.cpp b/LUA_GdbCreateSurf.cpp
index bb05e0c..18f4830 100644
--- a/LUA_GdbCreateSurf.cpp
+++ b/LUA_GdbCreateSurf.cpp
@@ -147,7 +147,7 @@ LuaCreateSurfFlatRegion( lua_State* L)
 static int
 LuaCreateSurfFrFatCurve( lua_State* L)
 {
-  // 4 parametri : ParentId, nCrvId, dRad, bSquared
+  // 4 o 5 parametri : ParentId, nCrvId, dRad, bSquared [,bSquaredMids]
    int nParentId ;
    LuaCheckParam( L, 1, nParentId)
    int nCrvId ;
@@ -156,9 +156,11 @@ LuaCreateSurfFrFatCurve( lua_State* L)
    LuaCheckParam( L, 3, dRad)
    bool bSquared ;
    LuaCheckParam( L, 4, bSquared)
+   bool bSquaredMids = bSquared ;
+   LuaGetParam( L, 5, bSquaredMids) ;
    LuaClearStack( L) ;
   // creo una regione piana
-   int nId = ExeCreateSurfFrFatCurve( nParentId, nCrvId, dRad, bSquared) ;
+   int nId = ExeCreateSurfFrFatCurve( nParentId, nCrvId, dRad, bSquared, bSquaredMids) ;
   // restituisco il risultato
    if ( nId != GDB_ID_NULL)
       LuaSetParam( L, nId) ;