diff --git a/Pocketing.cpp b/Pocketing.cpp
index a518e5b..97fdd3d 100644
--- a/Pocketing.cpp
+++ b/Pocketing.cpp
@@ -738,7 +738,7 @@ Pocketing::Update( bool bPostApply)
       return true ;
    }
 
-  // elimino le entit� CLIMB, RISE e HOME della lavorazione, potrebbero falsare i calcoli degli assi (in ogni casi vengono riaggiunte dopo) 
+  // elimino le entità CLIMB, RISE e HOME della lavorazione, potrebbero falsare i calcoli degli assi (in ogni casi vengono riaggiunte dopo) 
    RemoveClimbRiseHome() ;
 
   // imposto eventuale asse bloccato da lavorazione
@@ -1368,7 +1368,7 @@ Pocketing::SetCurveAllTempProp( int nCrvId, bool bForcedClose, ICurve* pCurve, b
       return false ;
    if ( pbSomeOpen != nullptr)
       *pbSomeOpen = false ;
-  // reset propriet� temporanee
+  // reset proprietà temporanee
    ResetCurveAllTempProp( pCurve) ;
   // se forzato chiuso o non presenti info per lati aperti, esco
    if ( bForcedClose  ||  ! m_pGeomDB->ExistsInfo( nCrvId, KEY_OPEN))
@@ -1397,6 +1397,17 @@ Pocketing::SetCurveAllTempProp( int nCrvId, bool bForcedClose, ICurve* pCurve, b
    return true ;
 }
 
+//----------------------------------------------------------------------------
+bool
+Pocketing::GetForcedClosed( void)
+{
+   int nOpen ;
+   if ( FromString( ExtractInfo( m_Params.m_sUserNotes, "Open="), nOpen)  &&  nOpen == 0)
+      return true ;
+   else
+      return false ;
+}
+
 //----------------------------------------------------------------------------
 bool
 Pocketing::ResetCurveAllTempProp( ICurve* pCurve)
@@ -1583,11 +1594,10 @@ Pocketing::ProcessPath( int nAuxId, int nPvId, int nClId)
 
    while ( nPathId != GDB_ID_NULL) { // Scorro tutte le curve concatenate per creare la superficie da lavorare
 
-      int nPi = m_pGeomDB->GetFirstInGroup( nPathId) ;
-      const IGeoObj* pGObj = m_pGeomDB->GetGeoObj( nPi) ;
-      if ( pGObj == nullptr)
+      int nPi = m_pGeomDB->GetFirstInGroup( nPathId) ; //nCrvId
+      if ( m_pGeomDB->GetGeoType( nPi) != CRV_COMPO)
          return false ;
-      const ICurve* pOriCurve = ::GetCurve( pGObj) ;
+      const ICurve* pOriCurve = ::GetCurve( m_pGeomDB->GetGeoObj( nPi)) ;
       if ( pOriCurve == nullptr)
          return false ;
       PtrOwner<ICurveComposite> pCompoOriCrv( GetCurveComposite( pOriCurve->Clone())) ;
@@ -1598,25 +1608,12 @@ Pocketing::ProcessPath( int nAuxId, int nPvId, int nClId)
       nProp0 = pCompoOriCrv->GetTempProp( 0) ; // id selezionato
       nProp1 = pCompoOriCrv->GetTempProp( 1) ; // lato adiancente per Trimesh
 
-      bool bSomeOpen = m_pGeomDB->ExistsInfo( nPi, KEY_OPEN) ;
-      if ( bSomeOpen) {
-         int nOpen ;
-         if ( FromString( ExtractInfo( m_Params.m_sUserNotes, "Open="), nOpen) && nOpen == 0)
-            bSomeOpen = false ;
-      }
-
      // annullo i flag di tratto aperto
       for ( int i = 0 ; i < int( pCompoOriCrv->GetCurveCount()) ; ++i)
          pCompoOriCrv->SetCurveTempProp( i, 0, 0) ; // alla sottocurva
 
-     // aggiorno flag per lati aperti
-      if ( bSomeOpen) {
-         INTVECTOR vOpen ;
-         m_pGeomDB->GetInfo( nPi, KEY_OPEN, vOpen) ;
-         for ( int j : vOpen)
-            pCompoOriCrv->SetCurveTempProp( j, 1, 0) ; // alla sottocurva
-      }
-
+      bool bSomeOpen ; // = m_pGeomDB->ExistsInfo( nPi, KEY_OPEN) ;
+      SetCurveAllTempProp( nPi, GetForcedClosed(), pCompoOriCrv, &bSomeOpen) ;
      // unisco le parti allineate (tranne inizio-fine se chiusa)
       if ( ! pCompoOriCrv->MergeCurves( 10 * EPS_SMALL, 10 * EPS_ANG_SMALL, false, true))
          return false ;
@@ -3321,8 +3318,7 @@ Pocketing::OptimizedZigZag( ISurfFlatRegion* pSrf, const Vector3d& vtTool, doubl
 
   // setto proprietà sulle curve
    if ( ! bSrfOriIsCut)
-      SetCurveAllTempProp( nCrvId, pCrvPocket) ;
-   SetCurveAllTempProp( nCrvId, GetForcedClosed(), pCrvPocket) ;
+      SetCurveAllTempProp( nCrvId, GetForcedClosed(), pCrvPocket) ;
    pCrvPocket->MergeCurves( 10 * EPS_SMALL, 10 * EPS_ANG_SMALL) ;
 
   // sistemo senso antiorario visto dalla direzione di estrusione
@@ -5070,6 +5066,13 @@ Pocketing::CalcSpiral( const ISurfFlatRegion* pSrfPock, int& nReg, Point3d& ptSt
          else
             return true ;
       }
+      bool bSomeOpen = false ;
+      int nTmpProp0 = -1 ;
+      for ( int u = 0 ; u < pCrvOEWithFlags->GetCurveCount()  &&  !bSomeOpen; ++ u) {
+         pCrvOEWithFlags->GetCurveTempProp( u, nTmpProp0, 0) ;
+         bSomeOpen = ( nTmpProp0 == 1) ;
+      }
+
      // caso trapezoide
       pCrvOEWithFlags->MergeCurves( 10 * EPS_SMALL, 10 * EPS_ANG_SMALL, true, true) ;
       Point3d pt ; Vector3d vtB1, vtL1, vtB2 ;
@@ -5086,9 +5089,11 @@ Pocketing::CalcSpiral( const ISurfFlatRegion* pSrfPock, int& nReg, Point3d& ptSt
          double dPocketSize = vtOrtho.Len() ;
          double dMaxOptSize ;
          FromString( ExtractInfo( m_Params.m_sUserNotes, "MaxOptSize="), dMaxOptSize) ;
-         if ( dPocketSize < m_TParams.m_dDiam + EPS_SMALL  &&
+         if ( ( ( bSomeOpen  &&  dPocketSize < m_TParams.m_dDiam + EPS_SMALL)  ||
+                  abs( dPocketSize - m_TParams.m_dDiam) < EPS_SMALL)  &&
               ( ! FromString( ExtractInfo( m_Params.m_sUserNotes, "MaxOptSize="), dMaxOptSize)  ||
-              dPocketSize < dMaxOptSize)) {
+              dPocketSize < dMaxOptSize)) 
+         {
             if ( nReg == 0) {
                CalcTrapezoidSpiral( pCrvOEWithFlags, vtDir, dPocketSize, pMCrv, pRCrv, bOptimizedTrap) ;
                if ( bOptimizedTrap) {
diff --git a/Pocketing.h b/Pocketing.h
index ebb0b8f..7a15e1d 100644
--- a/Pocketing.h
+++ b/Pocketing.h
@@ -71,6 +71,7 @@ class Pocketing : public Machining
    private :
       bool VerifyGeometry( SelData Id, int& nSubs, int& nType) ;
       bool GetCurves( SelData Id, ICURVEPLIST& lstPC) ;
+      bool GetForcedClosed( void) ;
       bool SetCurveAllTempProp( int nCrvId, bool bForcedClose, ICurve* pCurve, bool* pbSomeOpen = nullptr) ;
       bool ResetCurveAllTempProp( ICurve* pCurve) ;
       bool Chain( int nGrpDestId) ;