Re: [Boost-users] [asio] An error occured in asio::win_mutex.hpp

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 ftp_client_dtp(boost::asio::io_service& io_service)     : work_io_service_(),     work_resolver_(new boost::asio::ip::tcp::resolver(work_io_service_)),     work_socket_(new boost::asio::ip::tcp::socket(work_io_service_)) ===>>  {  } <...>  boost::scoped_ptrboost::asio::ip::tcp::resolver work_resolver_;  boost::scoped_ptrboost::asio::ip::tcp::socket work_socket_;

 boost::asio::io_service work_io_service_; <...>

Please, pay attention that member objects are initialized in the order of their definition. I.e., when you initialize work_resolver_ and work_socket_ you pass them uninitialized work_io_service_ as a parameter.