diff --git a/CalcPocketing.cpp b/CalcPocketing.cpp
index dffed81..986f17b 100644
--- a/CalcPocketing.cpp
+++ b/CalcPocketing.cpp
@@ -759,7 +759,7 @@ GetUnclearedRegion( ICRVCOMPOPOVECTOR& vFirstOffs, ICRVCOMPOPOVECTOR& vCrvs, ICU
          PtrOwner<ISurfFlatRegion> pSrfToolRegLinki( GetSurfFlatRegionFromFatCurve( Release( pCrvLink_i), s_dRad + 5 * EPS_SMALL, false, false)) ;
          if ( ! IsNull( pSrfToolRegLinki)) {
             if ( ! pSrfTool_Links->IsValid()  ||  pSrfTool_Links->GetChunkCount() == 0)
-               pSrfTool_Links.Set( GetBasicSurfFlatRegion( pSrfToolRegLinki)) ;
+               pSrfTool_Links.Set( GetBasicSurfFlatRegion( Release( pSrfToolRegLinki))) ;
             else
                pSrfTool_Links->Add( *pSrfToolRegLinki) ;
          }
@@ -2536,7 +2536,7 @@ CalcZigZag( const ISurfFlatRegion* pSrfZigZag, ICRVCOMPOPOVECTOR& vpCrvs, double
              vAddedLinks.emplace_back( pCrvLink->Clone()) ;
 
          // pSeg2 ora diventa pSeg1 e il procedimento si itera per tutto il percorso
-          pLastSeg.Set( Release( pSeg2)) ;
+          pLastSeg.Set( pSeg2) ;
       }
      // cerco nella stessa fila o in quella successiva sezione successiva raccordabile tramite il contorno
       double dUstart = Sec.dOe ;
@@ -3164,7 +3164,7 @@ AdjustLinkDifferentY( const ICurve* pCrvSegPrec, const ICurve* pCrvSegSucc, cons
    if ( IsNull( pSfrTrap_c))
       return false ;
    if ( ! pSfrTrap->Offset( - s_dRad / 5, ICurve::OFF_CHAMFER))
-      pSfrTrap.Set( Release( pSfrTrap_c)) ;
+      pSfrTrap.Set( pSfrTrap_c) ;
 
   // se il Link interseca questa regione, allora va eliminato
    CRVCVECTOR ccClass ;
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 8e19baa..159c2b9 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ