c++ - option '--opt' cannot be specified more than once -

running error boost program options. running command such prog --opt arg1 --opt arg2.

it returns error

option '--opt' cannot specified more once.

is there way use option name more once?

currently have program option defined such , has no default value. interested in figuring out way specify use of option name several times

po::value<std::string>() 

from http://www.radmangames.com/programming/how-to-use-boost-program_options:

specify option can specified multiple times

--option <value1> --option <value2> --option <value3>

("option", po::value<std::vector<arg_type> >(), "a list of values")