diff --git a/Operation.cpp b/Operation.cpp
index b0c0b11..a623d3d 100644
--- a/Operation.cpp
+++ b/Operation.cpp
@@ -643,10 +643,10 @@ Operation::ApproxWithArcsIfUseful( ICurveComposite* pCompo)
    int nCrvs = pCompo->GetCurveCount() ;
    if ( nCrvs < 5  ||  dLen > nCrvs * LIN_FEA_STD)
       return true ;
-  // calcolo approssimazione con archi
+  // calcolo approssimazione con archi (se possibile)
    PolyArc PA ;
    if ( ! pCompo->ApproxWithArcsEx( LIN_TOL_MID, ANG_TOL_STD_DEG, LIN_FEA_STD, PA))
-      return false ;
+      return true ;
   // sostituisco gli archi alle curve originali
    pCompo->Clear() ;
    if ( ! pCompo->FromPolyArc( PA))