Hi, I wrote the following code to test offset_separator //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// int main (int argc, char **argv) { using namespace std; typedef boost::offset_separator sep_type_t; typedef boost::tokenizer tokenizer_t; typedef tokenizer_t::const_iterator const_iterator; typedef tokenizer_t::iterator iterator; const string sentence = "Marry had a little lamb!"; int endMarkers[] = {5,3,1,6,4}; sep_type_t sep(endMarkers,endMarkers+3); tokenizer_t t_(sentence,sep); for (tokenizer_t::iterator i=t_.begin();i!=t_.end();++i) cout << endl << *i; return 0; } //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// I get the following result: Marry ha d a li ttl e lamb ! Any idea how I can fix it? I want each token on a separate line. I am providing zero-based end indices to separator. Thanks in advance, -Asif