diff --git a/LuaLibs/ProcessLapJoint.lua b/LuaLibs/ProcessLapJoint.lua
index 81935ed..128ad47 100644
--- a/LuaLibs/ProcessLapJoint.lua
+++ b/LuaLibs/ProcessLapJoint.lua
@@ -3537,7 +3537,11 @@ local function MakePocket( Proc, nPartId, b3Solid, ptPs, tvtN, nFaceRef, sMchFin
       return false, sErr
    end
    -- aggiungo geometria
-   EgtSetMachiningGeometry( {{ Proc.Id, (nFaceRef)}})
+   if Proc.LoopIdFacInd then
+      EgtSetMachiningGeometry( { Proc.LoopIdFacInd})
+   else
+      EgtSetMachiningGeometry( {{ Proc.Id, (nFaceRef)}})
+   end
    -- imposto uso faccia
    EgtSetMachiningParam( MCH_MP.FACEUSE, MCH_MILL_FU.ORTHO_CONT)
    -- imposto posizione braccio porta testa
@@ -3571,8 +3575,6 @@ local function MakePocket( Proc, nPartId, b3Solid, ptPs, tvtN, nFaceRef, sMchFin
       local _, dH, dV = EgtSurfTmFacetMinAreaRectangle( Proc.Id, nFaceRef, GDB_ID.ROOT)
       local bL = ( Proc.Fct < 4 or TestElleShape4( Proc) == 2)
       if bL and min( dH, dV) < 1.5 * dDiamTool then
-         EgtSetMachiningParam( MCH_MP.SUBTYPE, MCH_POCK_SUB.ZIGZAG)
-         EgtSetMachiningParam( MCH_MP.INVERT, false)
          if not bTipMill then
             EgtSetMachiningParam( MCH_MP.LEADINTYPE, MCH_POCK_LI.HELIX)
             EgtSetMachiningParam( MCH_MP.LITANG, dDiamTool)
@@ -3597,7 +3599,7 @@ local function MakePocket( Proc, nPartId, b3Solid, ptPs, tvtN, nFaceRef, sMchFin
    local sUserNotes = EgtGetMachiningParam( MCH_MP.USERNOTES) or ''
    sUserNotes = EgtSetValInNotes( sUserNotes, 'MaxElev', EgtNumToString( dElev, 1))
    sUserNotes = EgtSetValInNotes( sUserNotes, 'VMRS', 0)
-   if bOpenOutRaw then
+   if bOpenOutRaw or ( Proc.LoopIdFacInd and ( EgtGetInfo( Proc.LoopIdFacInd, 'OPEN', 'i') or -1) > -1) then
       sUserNotes = EgtSetValInNotes( sUserNotes, 'OpenOutRaw', 1)
    end
    EgtSetMachiningParam( MCH_MP.USERNOTES, sUserNotes)
@@ -7235,6 +7237,11 @@ local function MakeMoreFaces( Proc, nPhase, nRawId, nPartId, dOvmHead, bSinglePa
                   nUseRoughTool = 1
                end
             end
+            -- se presente curva da lavorare con lato aperto
+            if Proc.LoopIdFacInd and ( EgtGetInfo( Proc.LoopIdFacInd, 'OPEN', 'i') or -1) > -1 then
+               sMchFind = 'OpenPocket'
+               nUseRoughTool = 0
+            end
             -- se abilitato rinvio da sotto
             if bLapJointAngTrasm then
                if not EgtEndsWith( sMchFind, '_AT') then
@@ -8007,9 +8014,27 @@ local function MakeLongMoreFaces( Proc, nPhase, nRawId, nPartId, dOvmHead)
    local bPrevBhSideMill
    for i = 1, #vAddId do
       local b3Box = EgtGetBBoxGlob( vAddId[i], GDB_BB.STANDARD)
-      local nFct = EgtSurfTmFacetCount( vAddId[i])
+      local nFct = EgtSurfTmFacetCount( vAddId[i]) 
       local AddProc = { Id = vAddId[i], Grp = Proc.Grp, Prc = Proc.Prc, Box = b3Box, TotBox = Proc.Box, Fct = nFct, Flg = Proc.Flg, PartId = Proc.PartId, TaskId = Proc.TaskId, FeatureId = Proc.FeatureId, IsSplittedLapJoint = true, AffectedFaces = Proc.AffectedFaces, OkFromBottom = Proc.OkFromBottom}
       Topology.Classify( AddProc, b3Raw)
+
+
+      if i > 1 and 
+         ( ( Proc.Topology == 'Groove' and  Proc.IsThrough and Proc.Fct == 3 and Proc.AffectedFaces.Left and Proc.AffectedFaces.Right)
+         or ( Proc.Topology == 'Groove' and Proc.Fct == 4 and ( Proc.AffectedFaces.Left or Proc.AffectedFaces.Right))
+         or Proc.Topology == 'Pocket') then
+         local nFacInd = BL.GetFaceWithMostAdj( AddProc, nPartId)
+         if type( nFacInd) == "number" and nFacInd >= 0 then
+            local nLoopId, nLoopCnt = EgtExtractSurfTmFacetLoops( vAddId[i], nFacInd, nAddGrpId)
+            if nLoopId and nLoopCnt == 1 then
+               local nEdgeId = BL.GetEdgeToMachineFromVector( vAddId[i], nFacInd, -X_AX())
+               EgtSetInfo( nLoopId, 'OPEN', nEdgeId)
+               AddProc.LoopIdFacInd = nLoopId
+            end
+         end
+      end
+
+
       -- lasciare il false nel sesto parametro (perchè internamente viene verificato se diverso da nil)
       local bOk, sMyWarn
       bOk, sMyWarn, bPrevBhSideMill = MakeMoreFaces( AddProc, nPhase, nRawId, nPartId, dOvmHead, bAllWithEndCap, bPrevBhSideMill, bAllWithEndCap)
diff --git a/Version.lua b/Version.lua
index 8f921ab..9cc5dfb 100644
--- a/Version.lua
+++ b/Version.lua
@@ -3,4 +3,4 @@
 
 NAME = 'Beam'
 VERSION = '3.1a1'
-MIN_EXE = '2.7f2'
+MIN_EXE = '3.1a4'