[Boost-users] system error 22

hi, im trying the serialization examples in http://www.boost.org/doc/libs/1_40_0/doc/html/boost_asio/examples.html , the fact is that i'm getting and invalid argument error, i have examined deeply the code, and i found that the error comes from handle_read function in client.cpp which receive in its function parameter a system::error "e" that is equal to system 22; what is this error related with? thanks --