Hi: When I compile parallel boost graph library, I encounter the following errors: parallel-bgl-0.7.0/boost/graph/distributed/adjlist/serialization.hpp: In function `std::vector<int, std::allocator<int> > boost::detail::parallel::available_process_files(const std::string&)': parallel-bgl-0.7.0/boost/graph/distributed/adjlist/serialization.hpp:97: error: conversion from `boost::filesystem3::path' to non-scalar type `std::basic_string<char, std::char_traits<char>, std::allocator<char> >' requested make[2]: *** [libs/graph_parallel/test/CMakeFiles/adjlist_build_test.dir/adjlist_build_test.cpp.o] Error 1 make[1]: *** [libs/graph_parallel/test/CMakeFiles/adjlist_build_test.dir/all] Error 2 The CMake found the following software: gcc (GCC) 3.4.6, Boost version: 1.46.0 and openmpi 1.3, c++ (GCC) 3.4.6 20060404 (Red Hat 3.4.6-11) Do you guys have an idea what the problem is? Thanks Xin