diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index b84fe29..1a90e08 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_MachMgr.cpp b/LUA_MachMgr.cpp
index 14bc5aa..b188370 100644
--- a/LUA_MachMgr.cpp
+++ b/LUA_MachMgr.cpp
@@ -3693,7 +3693,7 @@ LuaGetCalcPositions( lua_State* L)
 static int
 LuaGetCalcTipFromPositions( lua_State* L)
 {
-  // da 5 a 10 parametri : dX, dY, dZ, dAngR1[, dAngR2][, dAngR3][, dAngR4][, dAngR5][, dAngR6], bBottom
+  // da 4 a 10 parametri : dX, dY, dZ, dAngR1[, dAngR2][, dAngR3][, dAngR4][, dAngR5][, dAngR6][, bBottom]
    double dX ;
    LuaCheckParam( L, 1, dX)
    double dY ;
@@ -3709,8 +3709,8 @@ LuaGetCalcTipFromPositions( lua_State* L)
       else
          break ;
    }
-   bool bBottom ;
-   LuaCheckParam( L, i, bBottom)
+   bool bBottom = false ;
+   LuaGetParam( L, i, bBottom) ;
    LuaClearStack( L) ;
   // calcolo il tip utensile dagli assi macchina
    Point3d ptTip ;