[ask@dhcp225 mongo-perl-driver]$ /opt/local/bin/mongoexport -h 127.1 test
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::too_many_positional_options_error> >'
what(): too many positional options
Abort trap

(there's no test database, if that makes a difference)