diff --git a/ProjectCurveSurfTm.cpp b/ProjectCurveSurfTm.cpp
index 0c3e660..2e43d4f 100644
--- a/ProjectCurveSurfTm.cpp
+++ b/ProjectCurveSurfTm.cpp
@@ -59,9 +59,9 @@ ProjectCurveOnSurfTm( const ICurve& crCrv, const ISurfTriMesh& tmSurf, const Vec
    vMyPt5ax.reserve( PL.GetPointNbr()) ;
 
   // proietto i punti della polilinea sulla superficie
-   double dU ;
+   double dPar ;
    Point3d ptP ;
-   bool bFound = PL.GetFirstUPoint( &dU, &ptP) ;
+   bool bFound = PL.GetFirstUPoint( &dPar, &ptP) ;
    while ( bFound) {
       Point3d ptL = GetToLoc( ptP, frRefLine) ;
       ILSIVECTOR vIntRes ;
@@ -85,9 +85,9 @@ ProjectCurveOnSurfTm( const ICurve& crCrv, const ISurfTriMesh& tmSurf, const Vec
          if ( ! vtN.Normalize())
             vtN = trTria.GetN() ;
         // aggiungo al vettore dei proiettati
-         vMyPt5ax.emplace_back( ptInt, vtN, dU, 1) ;
+         vMyPt5ax.emplace_back( ptInt, vtN, dPar, 1) ;
       }
-      bFound = PL.GetNextUPoint( &dU, &ptP) ;
+      bFound = PL.GetNextUPoint( &dPar, &ptP) ;
    }
 
   // rimuovo i punti allineati entro la tolleranza e non pił lontani tra loro del massimo