diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 79d7dd0..2e93bbb 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/OffsetCurve.cpp b/OffsetCurve.cpp
index 46855cf..6404d04 100644
--- a/OffsetCurve.cpp
+++ b/OffsetCurve.cpp
@@ -98,6 +98,9 @@ OffsetCurve::Make( const ICurve* pCrv, double dDist, int nType)
   // verifico se curva chiusa e non forzata aperta
    bool bClosed = ccCopy.IsClosed() && ( nType & ICurve::OFF_FORCE_OPEN) == 0 ;
 
+  // unisco parti allineate
+   ccCopy.MergeCurves( 10 * EPS_SMALL, ANG_TOL_STD_DEG, bClosed) ;
+
   // calcolo le lunghezze delle diverse entità
    DBLVECTOR vLens ;
    {