[Boost-users] [log] Sink format is ignored

Hello, I'm setting up a sink like this: boost::shared_ptr<sinks::text_file_backend> backend = boost::make_shared<sinks::text_file_backend> ( keywords::file_name = fileName, keywords::rotation_size = maxSize, keywords::format = "[%TimeStamp%][%LineID%]: %Message%", keywords::auto_flush = true ); typedef sinks::synchronous_sink<sinks::text_file_backend> file_sink; boost::shared_ptr<file_sink> sink = boost::make_shared<file_sink>(backend); sink->set_filter(!expr::has_attr(serv_attr)); logging::core::get()->add_sink(sink); logging::add_common_attributes(); However, it seems that keywords::format parameter is just ignored. What am I doing wrong?