Take a look at the separator character that appears in the data file. My recollection is that there's a mismatch between the tokenizer separator specified in the example, and that used in the data file. - Chris ----- Original Message ----- From: "Nicolas Guilhot" Newsgroups: gmane.comp.lib.boost.user Sent: Friday, June 07, 2002 10:14 AM Subject: [BGL] Problem with kevin-bacon sample Hi all, I compiled the kevin-bacon sample on a linux box without any problem, but when I try to run the program, I obtain an error output instead of what is expected. Any help would be appreciated. Here is the output off the program : kevin-bacon: /boost_1_27_0/boost/token_iterator.hpp:75: void boost::detail::tokenizer_policy::increment (Iterator &) [with Iterator = boost::iterator_adaptor, boost::detail::tokenizer_policy >, boost::char_delimiters_separator >, basic_string >, const basic_string > &, const basic_string > *, forward_iterator_tag, ptrdiff_t>, Type = basic_string >, TokenizerFunc = boost::char_delimiters_separator]: Assertion `b.base().valid_' failed. Abandon Thanks for any answer. Nicolas