sorry, the issue is not related to boost::serialization, but boost::spirit - see http://news.gmane.org/gmane.comp.lib.boost.user. Maybe it's even a gcc-3.4.6 bug on hp-ux B11.31 ia64 - see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42791 regards, Frank ___________________________________________________________ Preisknaller: WEB.DE DSL Flatrate für nur 16,99 Euro/mtl.! http://produkte.web.de/go/02/