Hi, The bgl interface for leda (in leda_graph.hpp) breaks for leda 6.0 Partly because leda reorganized its header file which is not reflected in the leda_graph.hpp "leda/graph.h" is now "leda/graph/graph.h". It fails even after putting the correct headers with error In file included from testDriveLedaOnBoost.cpp:1: ../../libraries/boost_1_35_0/boost/graph/leda_graph.hpp:886: error: template argument 1 is invalid ../../libraries/boost_1_35_0/boost/graph/leda_graph.hpp:886: error: expected unqualified-id before '{' token -sandeep