Hi all, I am trying to use Boost.Log for my application. The log code is in shared library (a plugin). Here is how I set up my .so logging, according to the documentation: // ville_numerique_logging.hpp #include <boost/log/common.hpp> #include <boost/log/core.hpp> #include <boost/log/trivial.hpp> #include <boost/log/filters.hpp> #include <boost/log/formatters.hpp> #include <boost/log/utility/init/to_file.hpp> enum severity_level { normal, notification, warning, error, critical }; BOOST_LOG_DECLARE_GLOBAL_LOGGER_INIT(my_logger, boost::log::sources::severity_logger< >) { boost::log::init_log_to_file ( boost::log::keywords::file_name = "/home/olivier/ville_numerique.log", boost::log::formatters::attr< unsigned int >("LineID"), boost::log::keywords::format = "[%TimeStamp%]: %_%" // log record format ); // boost::log::core::get()->set_filter // ( // boost::log::filters::attr< boost::log::trivial::severity_level >("Severity") >= boost::log::trivial::info // ); return boost::log::sources::severity_logger< >(); } In some of my method, I then try lo log: src::severity_logger< >& lg = my_logger::get(); BOOST_LOG_SEV(lg, normal) << "A regular message"; BOOST_LOG_SEV(lg, warning) << "Something bad is going on but I can handle it"; BOOST_LOG_SEV(lg, critical) << "Everything crumbles, shoot me now!"; But, nothing happens. The file is not created. If I uncomment the set_filter lines, it throws an exception: "Requested attribute value not found" Could you please help? I am fighting with this for a too long time now. Regards, Olivier ----------------------------------------------------- Olivier Tournaire MATIS - Institut Géographique National 73, Ave de Paris 94165 St Mandé cedex, France tel: (+33) 1 43 98 84 29 fax: (+33) 1 43 98 85 81