Hi, This would be my first post here. Needless to say I'm relatively a newbie when it comes to using Boost. I've recently decided to look into using Boost to ease some tasks in my future programming projects. I've stumbled upon Boost.Serialization and was amazed at the ease and power it provides. I've decided to use this to replace a hand-wrapped serialization library I created for a project I'm involved with since I foresee in the future more difficult serialization tasks that my library wouldn't be able to handle. So far so good, but during replacing my code with Boost.Serialization and going through various static asserts I've come to a obstacle I cannot figure out. My application saves message classes derived from a Message base class (it has a virtual deconstructor) and sends this serialized data over a UNIX socket for IPC between interconnected processes. The sending side seems to work fine as can be seen from the debugging output below: In base/module.cpp line 111 function SendMessage : [ 22 serialization::archive 3 4 core 10 LogMessage -1209954316 1 18 Sadrok::LogMessage 1 0 0 0 1168098092 55 Loaded module log from file modules/liblog.so pid 14250 ] However on the receiving side I have this: ia & BOOST_SERIALIZATION_NVP(msginfo.msg); which ends up throwing an bad_cast exception Unhandled exception: St8bad_cast msginfo.msg is Message* I even tried loading into a LogMessage * with the same error. I have (in the logmessage header) BOOST_CLASS_EXPORT for the LogMessage (otherwise Boost would've thrown unregistered_class while saving). I can provide more information although I wouldn't know what else to post. Generally I'd like to know if anyone has any idea why I'm getting the bad_cast exception, where it gets thrown, or at least how to figure out where the problem exists so I can fix it. Thank you Sadrok sadrok.za@gmail.com Yahoo! IM: sadrok_za Jabber ID: sadrok@jabber.obsidian.co.za