diff --git a/BatchProcessNew.lua b/BatchProcessNew.lua
index fec450d..68786ef 100644
--- a/BatchProcessNew.lua
+++ b/BatchProcessNew.lua
@@ -377,9 +377,6 @@ if bToProcess then
 
    -- Altrimenti, opero sul progetto corrente
    else
-      -- creo un gruppo temporaneo dove finiranno tutte le entità che non bisogna salvare, alla fine lo si cancella
-      BeamLib.CreateTempGroup()
-
       -- Recupero l'identificativo del gruppo di lavoro corrente
       local nMGrpId = EgtGetCurrMachGroup()
       -- Barra da creare
diff --git a/LuaLibs/BeamLib.lua b/LuaLibs/BeamLib.lua
index f4a83b7..5adef12 100644
--- a/LuaLibs/BeamLib.lua
+++ b/LuaLibs/BeamLib.lua
@@ -294,8 +294,12 @@ end
 
 -------------------------------------------------------------------------------------------------------------
 function BeamLib.CreateTempGroup()
-   local idTempGroup = EgtGroup( GDB_ID.ROOT)
-   EgtSetName( idTempGroup, "#TEMP_GROUP#")
+   local idTempGroup = BeamLib.GetTempGroup()
+   -- se non esiste, lo creo
+   if not idTempGroup then
+      idTempGroup = EgtGroup( GDB_ID.ROOT)
+      EgtSetName( idTempGroup, "#TEMP_GROUP#")
+   end
    return idTempGroup
 end
 
diff --git a/NestProcess.lua b/NestProcess.lua
index d3fd807..72f9c6f 100644
--- a/NestProcess.lua
+++ b/NestProcess.lua
@@ -472,6 +472,10 @@ while nMachGroup do
    nMachGroup = nNextMachGroup
 end
 
+-- si cancella gruppo temporaneo contenente entità da cancellare
+local idTempGroup = EgtGetFirstNameInGroup( GDB_ID.ROOT, "#TEMP_GROUP#") or nil
+EgtErase( idTempGroup)
+
 EgtResetCurrMachGroup()
 
 NEST.ERR = 0
diff --git a/Strategies/Standard/HEADCUT/HEADCUT.json b/Strategies/Standard/HEADCUT/HEADCUT.json
index 1c49971..a6b28c7 100644
--- a/Strategies/Standard/HEADCUT/HEADCUT.json
+++ b/Strategies/Standard/HEADCUT/HEADCUT.json
@@ -25,7 +25,7 @@
       {
          "sName": "bExecutePreCut",
          "sNameNge": "EXEC_PRECUT",
-         "sValue": "true",
+         "sValue": "false",
          "sDescriptionShort": "Force to add PreCuts",
          "sDescriptionLong": "Autocam will apply a machining on the theoretical zero, to avoid collision if the theoretical piece length doesn't correspond to the real length",
          "sType": "b",