diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 5ca631e..d6496a9 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/SfrCreate.cpp b/SfrCreate.cpp
index f5952df..d121263 100644
--- a/SfrCreate.cpp
+++ b/SfrCreate.cpp
@@ -120,11 +120,13 @@ GetSurfFlatRegionFromFatCurve( ICurve* pCrv, double dRadius, bool bSquareEnds, b
    PtrOwner<CurveComposite> pCompo1( CreateBasicCurveComposite()) ;
    if ( IsNull( pCompo1)  ||  ! pCompo1->AddCurve( Release( pCurve)))
       return nullptr ;
-  // se distanza tra gli estremi minore di due volte il raggio la chiudo
+  // se distanza tra gli estremi minore di due volte il raggio la chiudo, purchè curva abbastanza lunga
+   double dLen ;
    Point3d ptStart, ptEnd ;
    pCompo1->GetStartPoint( ptStart) ;
    pCompo1->GetEndPoint( ptEnd) ;
-   if ( Dist( ptStart, ptEnd) <= 2 * dRadius)
+   pCompo1->GetLength( dLen) ;
+   if ( dLen > 2 * dRadius  &&  Dist( ptStart, ptEnd) <= 2 * dRadius)
       pCompo1->Close() ;
   // tipo di offset
    int nOffsType = ( bSquareMids ? ICurve::OFF_EXTEND : ICurve::OFF_FILLET) ;