Hi, I am trying to allow unknown options in the command line of my application (as described in "Allowing Unknown Options" section of program_options docs). Here is the code snippet: //----------------------------------------------------- boost::program_options::options_description my_options("Options"); my_options.add_options() /* adding some allowed options */ ; boost::program_options::variables_map vm; boost::program_options::store( boost::program_options::command_line_parser( ac, av ).options( my_options ).allow_unregistered().run(), vm ); boost::program_options::notify( vm ); //----------------------------------------------------- If an option is not specified in my_options, the call boost::program_options::store() above throws exception "unknown option". (I checked that it is store() that throws.) Does anyone have any suggestions how I could store and access the option values in this case? Of course, I can use basic_parsed_options returned by run(), but it seems to defeat the convenience of the library. Is there any way to use store() and variables_map in this case? Thank you for help. Best regards, Vsevolod Vlaskine __________________________________________ Yahoo! DSL – Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com