Does anyone know a work around that does not need the typedefs? I had a look at the preprocessor library but I couldnt come up with a solution. Is there an alternative to the macros for registering types?

The BOOST_CLASS_EXPORT facility has been a struggle to get implemented so that it can be used in a natural way. Besides the problem you mention here (which is a new one for me) There were some new ones that have become apparent with compilers that use two-phase lookup. Another problem is over-zealous unreachable code optimization of some compilers eliminates the code that implements the serialization. The fix for this is inherently non-portable. Subject to the above it does work - but is kind of fragile and really not quite right - it will need to be re-implemented (yet) again. So I'm interested in your cases. Is it possible you could make a few boostified test programs that we would like to see work but currently fail at compile time? The really funny part about BOOST_CLASS_EXPORT is that is started out soooo simple and ends up touching on all sorts of unexpected difficulties. The good part is that its not a fundamental building block of the system so fixing it up won't impact the rest of the system. So there is hope. Robert Ramey