Dear Boosters, I have encountered the following problem compiling program_options on the IBM Visual Age compiler 6.0. There seems to be a problem with exception declarations: xlC -DHAVE_CONFIG_H -I../../src -I../../src -DNDEBUG -I/users/matroyer/boost -DNDEBUG -q32 -qlanglvl=extended -O2 -c -M /users/matroyer/boost/libs/program_options/src/convert.cpp -o convert.o "/users/matroyer/boost/boost/program_options/detail/ utf8_codecvt_facet.hpp", line 144.17: 1540-1163 (S) The exception-specification for "int boost::program_options::detail::utf8_codecvt_facet_wchar_t:: do_length(mbstate_t &, const char *, const char *, std::size_t) const" is less restrictive than the exception-specification for "int std::codecvt<wchar_t,char,char *>::do_length(_St &, const _To *, const _To *, size_t) const throw()". Can the throw() declaration be added to do_length()? Matthias