diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index dc6fd9d..5ee6bbf 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/OffsetCurve.cpp b/OffsetCurve.cpp
index 470207f..46855cf 100644
--- a/OffsetCurve.cpp
+++ b/OffsetCurve.cpp
@@ -359,7 +359,11 @@ OffsetCurve::Make( const ICurve* pCrv, double dDist, int nType)
      // distanza minima di alcuni punti interni della curva dalla curva originale
       if ( GetMinDist( 0.5, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL  ||
            GetMinDist( 0.25, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL  ||
-           GetMinDist( 0.75, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL) {
+           GetMinDist( 0.75, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL  ||
+           GetMinDist( 0.125, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL  ||
+           GetMinDist( 0.875, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL  ||
+           GetMinDist( 0.0625, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL  ||
+           GetMinDist( 0.9375, pCrv, &ccCopy) < fabs( dDist) - 5 * EPS_SMALL) {
          delete pCrv ;
          iIter = m_CrvLst.erase( iIter) ;
          continue ;