diff --git a/Operation.cpp b/Operation.cpp
index 802d27b..fbe724b 100644
--- a/Operation.cpp
+++ b/Operation.cpp
@@ -1147,7 +1147,7 @@ Operation::ApproxWithArcsIfUseful( ICurveComposite* pCompo, bool bCareTempProp)
             for ( int j = 0 ; j < pCC->GetCurveCount() ; ++ j)
                pCC->SetCurveTempProp( j, vInt[i].second) ;
            // reinserisco nel vettore di curve
-            vpCrvs.back().Set( Release( pCC)) ;
+            vpCrvs.back().Set( pCC) ;
          }
       }
      // riassemblo la curva e assegno le opportune proprietà
diff --git a/Pocketing.cpp b/Pocketing.cpp
index 0f0cfc2..9184b58 100644
--- a/Pocketing.cpp
+++ b/Pocketing.cpp
@@ -3885,7 +3885,7 @@ Pocketing::CalcSpiral( const ICurveComposite* pCompo, int nReg, bool bSplitArcs,
      // recupero la prossima curva di offset
       PtrOwner<ICurve> pNextOffs ;
       if ( ! vCrvStack.empty()) {
-         pNextOffs.Set( Release( vCrvStack.back())) ;
+         pNextOffs.Set( vCrvStack.back()) ;
          vCrvStack.pop_back() ;
          dCurrRad = vRadStack.back() ;
          vRadStack.pop_back() ;
@@ -3902,7 +3902,7 @@ Pocketing::CalcSpiral( const ICurveComposite* pCompo, int nReg, bool bSplitArcs,
       if ( bNextOk) {
         // sistemo per prossimo step
          dCurrRad = dRad ;
-         pOffs.Set( Release( pNextOffs)) ;
+         pOffs.Set( pNextOffs) ;
         // nuovo valore pari allo step
          dOffs = GetSideStep() ;
       }
@@ -3929,7 +3929,7 @@ Pocketing::CalcSpiral( const ICurveComposite* pCompo, int nReg, bool bSplitArcs,
      // calcolo il collegamento (garantendo che non esca dalla svuotatura)
       PtrOwner<ICurveComposite> pCrvLink( CreateCurveComposite()) ;
       if ( CalcBoundedLink( ptStart, ptEnd, vOffs[0], pCrvLink)) 
-         vLinks[i].Set( Release( pCrvLink)) ;
+         vLinks[i].Set( pCrvLink) ;
       else {
          m_pMchMgr->SetLastError( 2413, "Error in Pocketing : Toolpath not computable") ;
          return false ;
@@ -4851,7 +4851,7 @@ Pocketing::ComputePolishingPath( ICurveComposite* pMCrv, ICurveComposite* pRCrv,
      // calcolo il collegamento con biarchi (garantendo che non esca dalla svuotatura)
       PtrOwner<ICurveComposite> pCrvLink( CreateCurveComposite()) ;
       if ( CalcBoundedLinkWithBiArcs( ptStart, vtStart, ptEnd, vtEnd, pCrvBound, pCrvLink)) {
-         vLinks[i].Set( Release( pCrvLink)) ;
+         vLinks[i].Set( pCrvLink) ;
       }
       else {
          m_pMchMgr->SetLastError( 2413, "Error in Pocketing : Toolpath not computable") ;
diff --git a/SawFinishing.cpp b/SawFinishing.cpp
index 5ad4be3..f107165 100644
--- a/SawFinishing.cpp
+++ b/SawFinishing.cpp
@@ -987,7 +987,7 @@ SawFinishing::AdjustGeometry( int nAuxId)
         // verifiche sull'ampiezza dell'angolo al centro degli eventuali archi
          VerifyArcs( pCompo) ;
         // reinserisco nella curva originale
-         pGuide.Set( Release( pCompo)) ;
+         pGuide.Set( pCompo) ;
       }
      // deve iniziare in comune con la prima sezione ed essere ivi perpendicolare 
       Vector3d vtGdDir ;
diff --git a/SawRoughing.cpp b/SawRoughing.cpp
index cd19a91..03ea200 100644
--- a/SawRoughing.cpp
+++ b/SawRoughing.cpp
@@ -945,7 +945,7 @@ SawRoughing::AdjustGeometry( int nAuxId)
         // verifiche sull'ampiezza dell'angolo al centro degli eventuali archi
          VerifyArcs( pCompo) ;
         // reinserisco nella curva originale
-         pGuide.Set( Release( pCompo)) ;
+         pGuide.Set( pCompo) ;
       }
      // deve iniziare in comune con la prima sezione ed essere ivi perpendicolare 
       Vector3d vtGdDir ;
diff --git a/SurfFinishing.cpp b/SurfFinishing.cpp
index f63c289..f750af5 100644
--- a/SurfFinishing.cpp
+++ b/SurfFinishing.cpp
@@ -1379,7 +1379,7 @@ SurfFinishing::AddZigZag( ICAvToolSurfTm* pCAvTlStm, const Frame3d& frSurf,
             if ( IsNull( pCompo)  ||  ! pCompo->FromPolyLine( PL))
                return false ;
            // sostituisco la vecchia curva con la nuova
-            vpCrvs[k].Set( Release( pCompo )) ;
+            vpCrvs[k].Set( pCompo) ;
          }
         // ciclo sulle curve elementari
          int nMaxInd = vpCrvs[k]->GetCurveCount() - 1 ;
@@ -1740,7 +1740,7 @@ SurfFinishing::AddSpiral( ICAvToolSurfTm* pCAvTlStm, const Frame3d& frSurf,
             if ( IsNull( pCompo)  ||  ! pCompo->FromPolyLine( PL))
                return false ;
            // sostituisco la vecchia curva con la nuova
-            pMCrv.Set( Release( pCompo )) ;
+            pMCrv.Set( pCompo) ;
          }
         // ciclo sulle curve elementari
          int nMaxInd = pMCrv->GetCurveCount() - 1 ;
@@ -1903,7 +1903,7 @@ SurfFinishing::CalcSpiral( const ICurveComposite* pCompo, bool bSplitArcs,
       if ( bNextOk) {
         // sistemo per prossimo step
          dCurrRad = dRad ;
-         pOffs.Set( Release( pNextOffs)) ;
+         pOffs.Set( pNextOffs) ;
          pCurr = Get( pOffs) ;
         // nuovo valore pari allo step
          dOffs = GetSideStep() ;
diff --git a/WaterJetting.cpp b/WaterJetting.cpp
index 6263a9b..6cb4e90 100644
--- a/WaterJetting.cpp
+++ b/WaterJetting.cpp
@@ -1961,7 +1961,7 @@ WaterJetting::AddLeadInPreview( const ICurveComposite* pCompo, ISurfFlatRegion*
       {  PtrOwner<ICurveLine> pLine( CreateCurveLine()) ;
          if ( IsNull( pLine)  ||  ! pLine->Set( ptP1, ptStart))
             return false ;
-         pCrv.Set( Release( pLine)) ;
+         pCrv.Set( pLine) ;
       } break ;
    case WJET_LI_TANGENT :
       pCrv.Set( GetArc2PVN( ptStart, ptP1, - vtStart, vtN)) ;
@@ -2030,7 +2030,7 @@ WaterJetting::AddLeadOutPreview( const ICurveComposite* pCompo, ISurfFlatRegion*
          Point3d ptP1 = ptEnd + vtEnd * dTang + vtPerp * dPerp ;
          if ( IsNull( pLine)  ||  ! pLine->Set( ptEnd, ptP1))
             return false ;
-         pCrv.Set( Release( pLine)) ;
+         pCrv.Set( pLine) ;
       } break ;
    case WJET_LO_TANGENT :
       { // calcolo punto finale dell'uscita