[boost] boost serialization: unregistered_class exception

Using boost serialization I'm getting a unregistered_class exception. I know how to solve the problem once I figure out what class is having the problem. Figuring out which class is the problem can be a real pain when you have lots of templates. Is there anyway to get more information from boost serialization as to exactly what class is unregistered? Or is there anyway to inspect the archive and print out what classes are in the archive? I'm using 1.31. Thanks, Keith