diff --git a/EXE_Trimming.cpp b/EXE_Trimming.cpp
index ec55512..232fa8e 100644
--- a/EXE_Trimming.cpp
+++ b/EXE_Trimming.cpp
@@ -907,8 +907,8 @@ ExeTrimmingGetToolOrientationLines( int nParentId, int nMainEdgeId, int nOtherEd
    bool bBorderClosed = ( pCrvMainEdge->IsClosed()) ;
 
   // Recupero le Linee di Sincronizzazione iniziali e finali e verifico che giacciano sulle Curve di Bordo
-   ICurve* pCrvSyncS = GetCurve( pGeomDB->GetGeoObj( nLineSId)) ;
-   ICurve* pCrvSyncE = GetCurve( pGeomDB->GetGeoObj( nLineEId)) ;
+   PtrOwner<ICurve> pCrvSyncS( GetCurve( pGeomDB->GetGeoObj( nLineSId))->Clone()) ;
+   PtrOwner<ICurve> pCrvSyncE( GetCurve( pGeomDB->GetGeoObj( nLineEId))->Clone()) ;
    bOk = bOk && ( pCrvSyncS != nullptr && pCrvSyncS->IsValid() && pCrvSyncE != nullptr && pCrvSyncE->IsValid()) ;
    BIPOINT Line1, Line2 ;
    bOk = bOk && ( pCrvSyncS->GetStartPoint( Line1.first)) && ( pCrvSyncS->GetEndPoint( Line1.second)) ;