Looking at the syntax error suggests that "is_abstract" isn't working as expected. Serialization library has a work around- but it dependns on config setting correct #define. Try including #define BOOST_NO_IS_ABSTRACT. at the top. I'm really just grasping at straws here. If possible, I would recommend running the whole boost test suite locally. I say this because I don't know that aix and its associated compiler ? Visual Age? or? has really been tested with boost. Robert Ramey "DAN LEIBOVICH" <ddnnll@yahoo.com> wrote in message news:20070121221144.2891.qmail@web53002.mail.yahoo.com... Thank you for your reply. I tried to it but got the same error. Do you have other suggestion ? Thanks Dan Robert Ramey <ramey@rrsd.com> wrote: try including #include <boost/serialization/is_abstract.hpp> to the top of the program. This would bring demo.cpp up to date. Robert Ramey _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ------------------------------------------------------------------------------ Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A. ------------------------------------------------------------------------------ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users