diff --git a/SurfFinishing.cpp b/SurfFinishing.cpp
index a22a4ae..e0e785e 100644
--- a/SurfFinishing.cpp
+++ b/SurfFinishing.cpp
@@ -1408,7 +1408,7 @@ SurfFinishing::AddZigZag( ICAvToolSurfTm* pCAvTlStm, const Frame3d& frSurf, cons
    double dPockRadOffs = m_TParams.m_dDiam / 2 - m_Params.m_dSideStep - m_Params.m_dOverlap ;
    ICRVCOMPOPOVECTOR vpCrvs ;
    if ( ! CalcPocketing( pSfrPock, dPockRad, dPockRadOffs, m_Params.m_dSideStep, m_Params.m_dSideAngle,
-                         POCKET_ZIGZAG, false, false, true, false, nullptr, vpCrvs)) {
+                         POCKET_ZIGZAG, false, false, true, false, P_INVALID, nullptr, vpCrvs)) {
       m_pMchMgr->SetLastError( 3125, "Error in SurfFinishing : CalcPocketing failed") ;
       return false ;
    }
@@ -1609,7 +1609,7 @@ SurfFinishing::AddOneWay( ICAvToolSurfTm* pCAvTlStm, const Frame3d& frSurf, cons
    double dPockRadOffs = m_TParams.m_dDiam / 2 - m_Params.m_dSideStep - m_Params.m_dOverlap ;
    ICRVCOMPOPOVECTOR vpCrvs ;
    if ( ! CalcPocketing( pSfrPock, dPockRad, dPockRadOffs, m_Params.m_dSideStep, m_Params.m_dSideAngle,
-                         POCKET_ONEWAY, false, false, true, false, nullptr, vpCrvs)) {
+                         POCKET_ONEWAY, false, false, true, false, P_INVALID, nullptr, vpCrvs)) {
       m_pMchMgr->SetLastError( 3125, "Error in SurfFinishing : CalcPocketing failed") ;
       return false ;
    }
@@ -1811,7 +1811,7 @@ SurfFinishing::AddSpiral( ICAvToolSurfTm* pCAvTlStm, const Frame3d& frSurf, cons
    int nType = ( bInVsOut ? POCKET_SPIRALIN : POCKET_SPIRALOUT) ;
    ICRVCOMPOPOVECTOR vpCrvs ;
    if ( ! CalcPocketing( pSfrPock, dPockRad, dPockRadOffs, m_Params.m_dSideStep, m_Params.m_dSideAngle,
-                         nType, false, false, true, false, nullptr, vpCrvs)) {
+                         nType, false, false, true, false, P_INVALID, nullptr, vpCrvs)) {
       m_pMchMgr->SetLastError( 3125, "Error in SurfFinishing : CalcPocketing failed") ;
       return false ;
    }
diff --git a/SurfRoughing.cpp b/SurfRoughing.cpp
index 260c61f..f3503d4 100644
--- a/SurfRoughing.cpp
+++ b/SurfRoughing.cpp
@@ -1757,6 +1757,9 @@ SurfRoughing::AddPocket( const INTINTVECTOR& vPocket, const Vector3d& vtTool, co
    bool bInvert = m_Params.m_bInvert ;
   // numero di Step corrente
    int nCurrStep = 0 ;
+  /* punto finale di riferimento per il percorso attuale ( serve per trovare il punto iniziale
+     del percorso successivo) */
+   Point3d ptEndLastPath = P_INVALID ;
 
   // ciclo sulle regioni
    bool bStart = true ;
@@ -1773,7 +1776,7 @@ SurfRoughing::AddPocket( const INTINTVECTOR& vPocket, const Vector3d& vtTool, co
          const ISurfFlatRegion* pSfrL = GetSurfFlatRegion( m_pGeomDB->GetGeoObj( vId.second)) ;
          if ( pSfrL == nullptr)
             return false ;
-         pSfrLimit.Set( pSfrL->Clone()) ;
+         pSfrLimit.Set( CloneSurfFlatRegion( pSfrL)) ;
       }
      // se il tipo è SPIRAL_OUT e sto gestendo uno step intermedio, lo lavoro come SPIRAL_IN
       if ( nSubType == SURFROU_SUB_SPIRALOUT  &&  bIsSubStep) {
@@ -1790,7 +1793,7 @@ SurfRoughing::AddPocket( const INTINTVECTOR& vPocket, const Vector3d& vtTool, co
       ICRVCOMPOPOVECTOR vpCrvs ; // percorso di svuotatura
      // calcolo i percorsi di Pocketing
       if ( ! CalcPocketing( pSfrPock, m_TParams.m_dDiam / 2, 0., m_Params.m_dSideStep, m_Params.m_dSideAngle,
-                            nSubType, true, bInvert, false, true, pSfrLimit, vpCrvs)) {
+                            nSubType, true, bInvert, false, true, ptEndLastPath, pSfrLimit, vpCrvs)) {
          if ( bIsSubStep) {
             string sWarn = "Warning in SurfRoughing : CalcPocketing failed with substep (" + ToString( pSfrPock->GetTempParam( 0), 1) + ")" ;
             m_pMchMgr->SetWarning( 3055, sWarn) ;
@@ -1980,8 +1983,7 @@ SurfRoughing::AddPocket( const INTINTVECTOR& vPocket, const Vector3d& vtTool, co
            // se ultima entità
             if ( i == nMaxInd) {
               // dati fine entità
-               Point3d ptEnd ;
-               pCurve->GetEndPoint( ptEnd) ;
+               pCurve->GetEndPoint( ptEndLastPath) ;
                Vector3d vtEnd ;
                pCurve->GetEndDir( vtEnd) ;
               // determino elevazione su uscita
@@ -1989,7 +1991,7 @@ SurfRoughing::AddPocket( const INTINTVECTOR& vPocket, const Vector3d& vtTool, co
               // aggiungo uscita
                Point3d ptP1 ;
                SetFeed( GetEndFeed()) ;
-               if ( ! AddLeadOut( ptEnd, vtEnd, vtTool,
+               if ( ! AddLeadOut( ptEndLastPath, vtEnd, vtTool,
                                   ( ( nSubType == SURFROU_SUB_SPIRALIN  ||  nSubType == SURFROU_SUB_SPIRALOUT)) ? Get( pRCrv) : nullptr,
                                   bSplitArcs, false, ptP1, dEndElev)) {
                   m_pMchMgr->SetLastError( 3014, "Error in SurfRoughing : LeadOut not computable") ;