While I am trying to make an application (johnson-test) in Metrowerks CodeWarrior (ARMV5 UDEB) , I am getting the message : *armcc.exe** has encountered a problem and needs to close. *With error* ***Segementation fault *. This problem i am getting for the highlighted code given bolow... template <class IncidenceGraph, class Buffer, class BFSVisitor, class ColorMap> void breadth_first_visit (const IncidenceGraph& g, typename graph_traits<IncidenceGraph>::vertex_descriptor s, Buffer& Q, BFSVisitor vis, ColorMap color) { function_requires< IncidenceGraphConcept<IncidenceGraph> >(); typedef graph_traits<IncidenceGraph> GTraits; typedef typename GTraits::vertex_descriptor Vertex; typedef typename GTraits::edge_descriptor Edge; function_requires< BFSVisitorConcept<BFSVisitor, IncidenceGraph> >(); function_requires< ReadWritePropertyMapConcept<ColorMap, Vertex> >(); typedef typename property_traits<ColorMap>::value_type ColorValue; typedef color_traits<ColorValue> Color; typename GTraits::out_edge_iterator ei, ei_end; put(color, s, Color::gray()); vis.discover_vertex(s, g); Q.push(s); while (! Q.empty()) { Vertex u = Q.top(); Q.pop(); vis.examine_vertex(u, g); for (tie(ei, ei_end) = out_edges(u, g); ei != ei_end; ++ei) { Vertex v = target(*ei, g); vis.examine_edge(*ei, g); ColorValue v_color = get(color, v); if (v_color == Color::white()) { vis.tree_edge(*ei, g); put(color, v, Color::gray()); vis.discover_vertex(v, g); Q.push(v); } else { vis.non_tree_edge(*ei, g); if (v_color == Color::gray()) vis.gray_target(*ei, g); else vis.black_target(*ei, g); } } // end for put(color, u, Color::black()); vis.finish_vertex(u, g); //} // end while } // breadth_first_visit *Q.empty(), Q.pop(), Q.top(), ei!=ei.end* etc are creating problem Thanks & Regards Bijas K N 09886892854