diff --git a/LuaLibs/WMachiningLib.lua b/LuaLibs/WMachiningLib.lua
index cb1fd70..ced5592 100644
--- a/LuaLibs/WMachiningLib.lua
+++ b/LuaLibs/WMachiningLib.lua
@@ -180,5 +180,13 @@ function WMachiningLib.FindSurfacing( sType)
    end
 end
 
+---------------------------------------------------------------------
+function WMachiningLib.AddMachining( nProcId, sName, sMachining)
+   local nMchId, sFinalName = EgtAddMachining( sName, sMachining)
+   local nPriority = EgtGetInfo( nProcId, 'PRIORITY', 'i')
+   EgtSetInfo( nMchId, 'PRIORITY', nPriority)
+   return nMchId, sFinalName
+end
+
 -------------------------------------------------------------------------------------------------------------
 return WMachiningLib
diff --git a/LuaLibs/WProcessDrill.lua b/LuaLibs/WProcessDrill.lua
index bd01bb7..92ca899 100644
--- a/LuaLibs/WProcessDrill.lua
+++ b/LuaLibs/WProcessDrill.lua
@@ -375,7 +375,7 @@ function WPD.Make( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione
    local sName = EgtIf( sHead == 'H5' or sHead == 'H6', 'LhDrill_', 'Drill_') .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchId = EgtAddMachining( sName, sDrilling)
+   local nMchId = WM.AddMachining( Proc.Id, sName, sDrilling)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sDrilling
       EgtOutLog( sErr)
@@ -505,7 +505,7 @@ function WPD.Make( Proc, nRawId, b3Raw)
       
       -- inserisco la lavorazione
       local sName = 'PreDrill_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-      local nMchId = EgtAddMachining( sName, sDrilling)
+      local nMchId = WM.AddMachining( Proc.Id, sName, sDrilling)
       if not nMchId then
          local sErr = 'Error adding machining ' .. sName .. '-' .. sDrilling
          EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessDtMortise.lua b/LuaLibs/WProcessDtMortise.lua
index 811e74a..5fc0609 100644
--- a/LuaLibs/WProcessDtMortise.lua
+++ b/LuaLibs/WProcessDtMortise.lua
@@ -159,7 +159,7 @@ function WPDM.Make( Proc, nRawId, b3Raw)
       end
       -- inserisco la lavorazione di svuotatura
       local sName = 'DtMtPck_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-      local nMchFId = EgtAddMachining( sName, sPocketing)
+      local nMchFId = WM.AddMachining( Proc.Id, sName, sPocketing)
       if not nMchFId then
          local sErr = 'Error adding machining ' .. sName .. '-' .. sPocketing
          EgtOutLog( sErr)
@@ -189,7 +189,7 @@ function WPDM.Make( Proc, nRawId, b3Raw)
    for i = nPass, 1, -1 do
       -- inserisco la lavorazione di contornatura
       local sNameF = 'DtMt_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id)) .. '_' .. tostring( nPass)
-      local nMchFId = EgtAddMachining( sNameF, sMilling)
+      local nMchFId = WM.AddMachining( Proc.Id, sNameF, sMilling)
       if not nMchFId then
          local sErr = 'Error adding machining ' .. sNameF .. '-' .. sMilling
          EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessFreeContour.lua b/LuaLibs/WProcessFreeContour.lua
index d72f34b..2ddf6be 100644
--- a/LuaLibs/WProcessFreeContour.lua
+++ b/LuaLibs/WProcessFreeContour.lua
@@ -1017,7 +1017,7 @@ local function AddMillCornerMachining( nPartId, nNewProc, nFacInd, tFacAdj, nTyp
    end
    -- inserisco la lavorazione
    local sName = 'Clean_' .. ( EgtGetName( nNewProc) or tostring( nNewProc))
-   local nMchId = EgtAddMachining( sName, sMilling) 
+   local nMchId = WM.AddMachining( nNewProc.Id, sName, sMilling)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
@@ -1312,7 +1312,7 @@ local function AddMillings( sMilling, vFace, Proc, nRawId, b3Raw, nConeCut, nAdd
       if ( vFace[i].Type & 1) ~= 0 and ( not j or vFace[j].Type == 0 or vFace[j].Type == 1 or abs( vFace[i].SideAng) > 0.1 or abs( vFace[j].SideAng) > 0.1) then
          -- inserisco la lavorazione
          local sName = 'Free_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId))
-         local nMchId = EgtAddMachining( sName, sMilling)
+         local nMchId = WM.AddMachining( Proc.Id, sName, sMilling)
          if not nMchId then
             local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
             EgtOutLog( sErr)
@@ -1406,7 +1406,7 @@ local function AddMillings( sMilling, vFace, Proc, nRawId, b3Raw, nConeCut, nAdd
       if ( vFace[i].Type & 2) ~= 0  or ( vFace[i].Type == 4 and ( vFace[i].Edges > 3 and not vFace[i].Is3EdgesApprox)) then
          -- inserisco la lavorazione
          local sName = 'Free_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId))
-         local nMchId = EgtAddMachining( sName, sMilling)
+         local nMchId = WM.AddMachining( Proc.Id, sName, sMilling)
          if not nMchId then
             local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
             EgtOutLog( sErr)
@@ -1607,7 +1607,7 @@ local function AddMillings( sMilling, vFace, Proc, nRawId, b3Raw, nConeCut, nAdd
       if vFace[i].Split then
          -- inserisco la lavorazione
          local sName = 'Free_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId)) .. '_M'
-         local nMchId = EgtAddMachining( sName, sMilling)
+         local nMchId = WM.AddMachining( Proc.Id, sName, sMilling)
          if not nMchId then
             local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
             EgtOutLog( sErr)
@@ -1698,7 +1698,7 @@ local function AddSawings( sSawing, vFace, Proc, nRawId, b3Raw)
       if ( vFace[i].Type & 1) ~= 0 then
          -- inserisco la lavorazione
          local sName = 'Free_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId))
-         local nMchId = EgtAddMachining( sName, sSawing)
+         local nMchId = WM.AddMachining( Proc.Id, sName, sSawing)
          if not nMchId then
             local sErr = 'Error adding machining ' .. sName .. '-' .. sSawing
             EgtOutLog( sErr)
@@ -1746,7 +1746,7 @@ local function AddSawings( sSawing, vFace, Proc, nRawId, b3Raw)
       if ( vFace[i].Type & 2) ~= 0 or ( vFace[i].Type == 4 and ( vFace[i].Edges > 3 and not vFace[i].Is3EdgesApprox) and vFace[i].Len > dSawDiam + 1) then
          -- inserisco la lavorazione
          local sName = 'Free_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId))
-         local nMchId = EgtAddMachining( sName, sSawing)
+         local nMchId = WM.AddMachining( Proc.Id, sName, sSawing)
          if not nMchId then
             local sErr = 'Error adding machining ' .. sName .. '-' .. sSawing
             EgtOutLog( sErr)
@@ -1817,7 +1817,7 @@ local function AddCuts( sCutting, vFace, Proc, nRawId, b3Raw, dSawThick)
          local h = EgtIf( i > 1, i - 1, EgtIf( bClosed, #vFace, nil))
          -- inserisco la lavorazione
          local sName = 'Cut_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId)) .. '_' .. tostring( i) 
-         local nMchId = EgtAddMachining( sName, sCutting)
+         local nMchId = WM.AddMachining( Proc.Id, sName, sCutting)
          if not nMchId then
             local sErr = 'Error adding machining ' .. sName .. '-' .. sCutting
             EgtOutLog( sErr)
@@ -2157,7 +2157,7 @@ local function MakeByMill( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione
    local sName = 'Free_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchId = EgtAddMachining( sName, sMilling)
+   local nMchId = WM.AddMachining( Proc.Id, sName, sMilling)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
@@ -2259,7 +2259,7 @@ local function MakeByMark( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione
    local sName = 'FreeMark_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchId = EgtAddMachining( sName, sMilling)
+   local nMchId = WM.AddMachining( Proc.Id, sName, sMilling)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
@@ -2324,7 +2324,7 @@ local function MakeByNail( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione
    local sName = 'Nail_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchId = EgtAddMachining( sName, sNailing)
+   local nMchId = WM.AddMachining( Proc.Id, sName, sNailing)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sNailing
       EgtOutLog( sErr)
@@ -2463,7 +2463,7 @@ local function MakeByPocket( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione di svuotatura
    local sName = 'Pock_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sPocketing)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sPocketing)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sPocketing
       EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessLapJoint.lua b/LuaLibs/WProcessLapJoint.lua
index 3df915d..8acec71 100644
--- a/LuaLibs/WProcessLapJoint.lua
+++ b/LuaLibs/WProcessLapJoint.lua
@@ -984,7 +984,7 @@ local function AddMillCornerMachining( nPartId, nNewProc, nFacInd, tFacAdj, nTyp
    end
    -- inserisco la lavorazione
    local sName = 'Clean_' .. ( EgtGetName( nNewProc) or tostring( nNewProc))
-   local nMchId = EgtAddMachining( sName, sMilling) 
+   local nMchId = WM.AddMachining( nNewProc.Id, sName, sMilling)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
@@ -1275,7 +1275,7 @@ local function MakeByChainSaw( Proc, nFacet, nRawId, b3Raw, dElev, dH, dV)
    for i = 1, nStep do
       -- Applico la lavorazione con sega a catena a questa faccia
       local sName = 'Csaw_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id)) .. '_' .. tostring( i)
-      local nMchFId = EgtAddMachining( sName, sSawing)
+      local nMchFId = WM.AddMachining( Proc.Id, sName, sSawing)
       if not nMchFId then
          local sErr = 'Error adding machining ' .. sName .. '-' .. sSawing
          EgtOutLog( sErr)
@@ -1362,7 +1362,7 @@ local function MakeByMill( Proc, nFacet, nOthFac, nRawId, b3Raw, dSideDist)
    end
    -- inserisco la lavorazione di contornatura
    local sName = 'Mill_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sMilling)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sMilling)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
@@ -1732,7 +1732,7 @@ local function MakeSideGrooveByMill( Proc, nFacet, nRawId, b3Raw, sCustomMach, d
          end
          -- inserisco la lavorazione di fresatura
          local sNameGorge = 'Gorge_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id)) .. tostring( nFacet) .. '_' .. tostring( nNm) 
-         local nMchFId = EgtAddMachining( sNameGorge, sMillingGorge)
+         local nMchFId = WM.AddMachining( Proc.Id, sNameGorge, sMillingGorge)
          if not nMchFId then
             local sErr = 'Error adding machining ' .. sNameGorge .. '-' .. sMillingGorge
             EgtOutLog( sErr)
@@ -1783,7 +1783,7 @@ local function MakeSideGrooveByMill( Proc, nFacet, nRawId, b3Raw, sCustomMach, d
          nNm = nNm + 1
          -- inserisco la lavorazione di taglio sfrido gorge
          local sNameGorge = 'GorgeCut_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id)) .. tostring( nFacet) .. '_' .. tostring( nNm) 
-         local nMchFId = EgtAddMachining( sNameGorge, sCuttingGorge)
+         local nMchFId = WM.AddMachining( Proc.Id, sNameGorge, sCuttingGorge)
          if not nMchFId then
             local sErr = 'Error adding machining ' .. sNameGorge .. '-' .. sCuttingGorge
             EgtOutLog( sErr)
@@ -1842,7 +1842,7 @@ local function MakeSideGrooveByMill( Proc, nFacet, nRawId, b3Raw, sCustomMach, d
    if not bExcludeSideMill then
       -- inserisco la lavorazione di ribasso o gola
       local sName = EgtIf( bEnablePreMill ~= nil, 'SideMill_', 'Mill_') .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-      local nMchFId = EgtAddMachining( sName, sMilling)
+      local nMchFId = WM.AddMachining( Proc.Id, sName, sMilling)
       if not nMchFId then
          local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
          EgtOutLog( sErr)
@@ -1966,7 +1966,7 @@ local function MakeSideGrooveByMill( Proc, nFacet, nRawId, b3Raw, sCustomMach, d
    if dAng and dAng > -90 + 10 * GEO.EPS_SMALL and not bExcludeFinishing then
       -- inserisco la lavorazione di contornatura
       local sName = 'Mill_Oth_Fac_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-      local nMchFId = EgtAddMachining( sName, sMilling)
+      local nMchFId = WM.AddMachining( Proc.Id, sName, sMilling)
       if not nMchFId then
          local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
          EgtOutLog( sErr)
@@ -2154,7 +2154,7 @@ local function MakeByPocketing( Proc, nFacet, nRawId, b3Raw, bCheckQPar)
    end
    -- inserisco la lavorazione di svuotatura
    local sName = 'Pock_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sPocketing)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sPocketing)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sPocketing
       EgtOutLog( sErr)
@@ -2231,7 +2231,7 @@ local function MakeOneFace( Proc, nRawId, b3Raw)
    end
    -- eseguo il taglio di lama
    local sName = 'Cut_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId)) .. '_' .. tostring( Proc.Id) 
-   local nMchId = EgtAddMachining( sName, sCutting)
+   local nMchId = WM.AddMachining( Proc.Id, sName, sCutting)
    if not nMchId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sCutting
       EgtOutLog( sErr)
@@ -2509,7 +2509,7 @@ local function MakeTwoFaces( Proc, nRawId, b3Raw)
    for i = 1, 2 do
       -- inserisco la lavorazione
       local sName = 'Cut_' .. ( EgtGetName( Proc.PartId) or tostring( Proc.PartId)) .. '_' .. tostring( Proc.Id) .. '_' .. tostring( i) 
-      local nMchId = EgtAddMachining( sName, sCutting)
+      local nMchId = WM.AddMachining( Proc.Id, sName, sCutting)
       if not nMchId then
          local sErr = 'Error adding machining ' .. sName .. '-' .. sCutting
          EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessMark.lua b/LuaLibs/WProcessMark.lua
index c39556c..c4e90db 100644
--- a/LuaLibs/WProcessMark.lua
+++ b/LuaLibs/WProcessMark.lua
@@ -107,7 +107,7 @@ function WPMK.Make( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione di fresatura
    local sName = 'Decor_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sMilling)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sMilling)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
@@ -131,7 +131,7 @@ function WPMK.Make( Proc, nRawId, b3Raw)
    if AuxId then
       -- inserisco la lavorazione di fresatura
       local sName2 = 'Decor2_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-      local nMchF2Id = EgtAddMachining( sName, sMilling)
+      local nMchF2Id = WM.AddMachining( Proc.Id, sName, sMilling)
       if not nMchF2Id then
          local sErr = 'Error adding machining ' .. sName2 .. '-' .. sMilling
          EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessMortise.lua b/LuaLibs/WProcessMortise.lua
index 5082c74..2eb5d09 100644
--- a/LuaLibs/WProcessMortise.lua
+++ b/LuaLibs/WProcessMortise.lua
@@ -250,7 +250,7 @@ function WPM.Make( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione di svuotatura
    local sName = 'Mort_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sPocketing)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sPocketing)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sPocketing
       EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessText.lua b/LuaLibs/WProcessText.lua
index a67651e..2434bdd 100644
--- a/LuaLibs/WProcessText.lua
+++ b/LuaLibs/WProcessText.lua
@@ -77,7 +77,7 @@ function WPT.Make( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione di fresatura
    local sName = 'Text_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sMilling)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sMilling)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sMilling
       EgtOutLog( sErr)
diff --git a/LuaLibs/WProcessVariant.lua b/LuaLibs/WProcessVariant.lua
index 303be65..8df69c3 100644
--- a/LuaLibs/WProcessVariant.lua
+++ b/LuaLibs/WProcessVariant.lua
@@ -71,7 +71,7 @@ local function MakeCode_1( Proc, nRawId, b3Raw)
    end
    -- inserisco la lavorazione di finitura superficie
    local sName = 'SurfFin_' .. ( EgtGetName( Proc.Id) or tostring( Proc.Id))
-   local nMchFId = EgtAddMachining( sName, sSurfFin)
+   local nMchFId = WM.AddMachining( Proc.Id, sName, sSurfFin)
    if not nMchFId then
       local sErr = 'Error adding machining ' .. sName .. '-' .. sSurfFin
       EgtOutLog( sErr)
diff --git a/LuaLibs/WallExec.lua b/LuaLibs/WallExec.lua
index 4ffae3d..c96a022 100644
--- a/LuaLibs/WallExec.lua
+++ b/LuaLibs/WallExec.lua
@@ -652,6 +652,7 @@ function WallExec.ProcessFeatures()
          local nPriority = EgtGetInfo( nOperId or GDB_ID.NULL, 'PRIORITY', 'i')
          if nPriority and nPriority ~= 0 then vPriority[nCurrentPriorityId] = nPriority end
          nCurrentPriorityId = nCurrentPriorityId + 1
+         nOperId = EgtGetNextOperation( nOperId)
       end
       for i = 1, #vPriority do
          PrevMch = SortMachinings( nPhase, PrevMch, nil, vPriority[i])