diff --git a/EGkCurveComposite.h b/EGkCurveComposite.h
index ea27959..15bbba7 100644
--- a/EGkCurveComposite.h
+++ b/EGkCurveComposite.h
@@ -93,10 +93,16 @@ inline ICurveComposite* ConvertCurveToComposite( IGeoObj* pGObj)
                     delete pGObj ;
                     return nullptr ;
                  }
-                 ICurveComposite* pCrvCo = CreateCurveComposite() ;
-                 if ( pCrvCo == nullptr) {
-                    delete pGObj ;
-                    return nullptr ;
+                 ICurveComposite* pCrvCo = GetCurveComposite( pGObj) ;
+                 if ( pCrvCo != nullptr) {
+                    return pCrvCo ;
+                 }
+                 else {
+                    pCrvCo = CreateCurveComposite() ;
+                    if ( pCrvCo == nullptr) {
+                       delete pGObj ;
+                       return nullptr ;
+                    }
                  }
                  ICurve* pCrv = static_cast<ICurve*>( pGObj) ;
                  Vector3d vtExtr ;