Hi, for a porting job i needed to shift from OSF tru64 to HP-UX V3 ia64 (on both using gcc-3.4.4) There i have stream error exception for boost::serialization data import via XML. The exception is thrown here: include/boost/archive/impl/basic_xml_iarchive.ipp: template<class Archive> BOOST_ARCHIVE_OR_WARCHIVE_DECL(void) basic_xml_iarchive<Archive>::load_start(const char *name){ // if there's no name if(NULL == name) return; bool result = this->This()->gimpl->parse_start_tag(this->This()->get_is()); if(true != result){ boost::throw_exception( archive_exception(archive_exception::stream_error) ); } // don't check start tag at highest level ++depth; return; } I.e. it fails to parse the XML data via boost:spirit. I tried to debug with 'gdb', but was impossible for me at the level of boost::spirit parser implementation. Then i was remembering, that there are two sets of boost libs - one "normal" and a "debug" version. So i switched to the debug version - just to see, if i can better dig into the details with 'gdb' with it. And suddenly the problem was gone. I.e. my application works, if i link with libboost_serialization-gcc-d.a But it doesn't work, if i link with libboost_serialization-gcc.a I also tried to extract all the stuff from the boost::serialization, that is used by my application, into a little test program. Just to feed in the same XML string, that fails for my application. I wanted to see, that i can re-produce the problem - but for a minimum program. - for using that next to evaluate deeper. But - unfortunately - for my test programm it works (with both library versions, "debug" and "normal" one). So it is really hard to find the reason for the problem. I also checked about compiler support on the boost.org pages. And actually it was only boost lib 1.38.0, which mentions HP-UX IA64 together with gcc. But that was gcc-4.2.1 (i use 3.4.4.). Before 1.38.0, it was alway the HP native compiler (not gcc). After 1.38.0 HP-UX is not mentioned at all anymore. So i guess i am generally in bad conditions for my "constellation" (HP-UX ia64 V3, gcc-3.4.4, boost 1.33.1). What is the difference about "debug" lib image and "non-debug" lib image? Is it just optimization level for the compiler? Do you have any hint for me? It might be a problem of gcc-3.4.4 itself on hp-ux (i'll check). But it would be interesting to here, if s.o. else had the same problem(?!) - many thanks! Frank Bergemann ____________________________________________________________________ WEB.DE MillionenKlick: Kostenlos tippen, täglich 1 Million gewinnen! http://produkte.web.de/go/07/