Hi All, I am trying to serialise a vector of shared_ptr's which point to a base class which may be one of a number of derived class (Not polymorphic in that the base class has no virtual functions - its just supplies base functionality to derived classes) In very pseudo code Class A Class B : public A Class C : public A vector<shared_ptr<A> > list; list.insert(shared_ptr<A> (new B)); list.insert(shared_ptr<A> (new C)); In serialise Ar & boost::serialization::make_nvp("ListofStuff", list); Reading the documentation, I believe this should work, but I am getting a bus error on our embedded system when it tries to serialise the vector (all the other bits have serialised ok which implies it's all compiled OK) - it managed "<px" into the XML archive then failed (see below for file). Bus error can mean a number of things on our board, but usually an alignment problem. Anyone any idea where I should look to sort this out? XML output (starts to serialise pointer on last line): <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> <!DOCTYPE boost_serialization> <boost_serialization signature="serialization::archive" version="3"> <temp class_id="0" tracking_level="0" version="0"> <Name>Message1</Name> <Filename class_id="1" tracking_level="0" version="0"> <path>/home/jhughes/msg.xml</path> </Filename> <Panels class_id="2" tracking_level="0" version="0"> <count>1</count> <item class_id="3" tracking_level="0" version="1"> <px</boost_serialization> James This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.