Hello. I encountered a problem when tried to use base64_from_binary and binary_from_base64. * **typedef* vector<unsigned char> RawData_t; ** *typedef* base64_from_binary<transform_width<RawData_t::const_iterator, 6, 8> > to_base64_transformer; ** *typedef* transform_width<binary_from_base64<RawData_t::const_iterator>, 8, 6 > to_binary_transformer; RawData_t unicomm::files::base64encode(*const* RawData_t& src) { *return* RawData_t(to_base64_transformer(src.begin()), to_base64_transformer(src.end())); } The problem is in that source sequence should be multiple of 3. When I try to use sequence with different size I get assertion failure in std::vector class which tells: iterator is not dereferencable. It seems those dataflow iterators try to look for data after the input sequence end(). The problem is already discussed here: http://lists.boost.org/boost-users/2008/08/39790.php But, there is (above) no any valuable information about the problem. Is it bug or feature? How can I resove the problem? It is an abiltity to complete the input collection to make it multiple of 3 and on other side remove that dummy information added before. But, it is wanted that it would be more correctly resolved. Did anybody have any solution? Thank you.