diff --git a/LuaLibs/ProcessLongCut.lua b/LuaLibs/ProcessLongCut.lua
index 791b7d2..874cdd0 100644
--- a/LuaLibs/ProcessLongCut.lua
+++ b/LuaLibs/ProcessLongCut.lua
@@ -340,11 +340,7 @@ end
 
 ---------------------------------------------------------------------
 -- lavorazione faccia laterale con sega a catena
-local function MakeSideFaceByChainSaw( nSurfId, bFront, dDepth, dOffs, dSal, dEal)
-   -- inizializzazione parametri
-   if bFront == nil then
-      bFront = true
-   end
+local function MakeSideFaceByChainSaw( nSurfId, dDepth, dOffs, dSal, dEal)
    -- Recupero i dati dell'utensile
    local sSawing = ML.FindSawing( 'Sawing')
    local dMaxMat = 0
@@ -974,7 +970,7 @@ function ProcessLongCut.Make( Proc, nPhase, nRawId, nPartId, bCustUseBlade, nCus
          for i = nC, 1, -1 do
             local dSal = EgtIf( i == nC, -dEndDist, - dEndAccDist - ( nC - i - 1) * dC)
             local dEal = EgtIf( i == 1, -dStartDist, - dStartAccDist - ( i - 2) * dC)
-            local bChainSawOk, sErr = MakeSideFaceByChainSaw( Proc.Id, bFront, dChainSawDepth, dChainSawOverMaterial, dSal, dEal)
+            local bChainSawOk, sErr = MakeSideFaceByChainSaw( Proc.Id, dChainSawDepth, dChainSawOverMaterial, dSal, dEal)
             if not bChainSawOk then return false, sErr end
          end
       end