diff --git a/VolZmapGraphics.cpp b/VolZmapGraphics.cpp
index 05209e8..45c868f 100644
--- a/VolZmapGraphics.cpp
+++ b/VolZmapGraphics.cpp
@@ -4619,7 +4619,7 @@ VolZmap::GetEdges( ICURVEPOVECTOR& vpCurve) const
          bool bInvert = ( vId[i] < 0) ;
          PtrOwner<ICurveLine> pLine( CreateCurveLine()) ;
          if ( IsNull( pLine)  ||  ! pLine->Set( vBpt[nInd].first, vBpt[nInd].second))
-            return false ;
+            continue ;
          if ( bInvert)
             pLine->Invert() ;
         // lo accodo alla composita