Hello, I’ve noticed a crash (accessing a null pointer) inside the boost serialization (version 1.44). I use visual studio 2005, the code to serialize is in a Dll. I have a small visual studio solution that reproduces the crash, I guess it is a bug and should cause a crash in other environments as well. I have the following classes INode (Interface) Node (Abstract, derived from INode) LeafNode(derived from Node) TableNode(derived from Node) The TableNode has a list of INode*, the children. A TableNode itself can be a child of a TableNode. All classes are inside a Dll and correctly exported (I have no “unregistered class” exceptions). If I create a TableNode with some entries including another TableNode and serialize it as an object, I get the crash when trying to deserialize later. If I do the same, but serialize the parent TableNode as a pointer, it works. I guess the serialization framework does not recognize that a TableNode gets serialized through a pointer and therefore the object tracking does not work correctly. I can send the example solution if needed. The crash is in the basic_iarchive.cpp, line 456 (bpis_ptr is null): if(! tracking){ bpis_ptr->load_object_ptr(ar, t, co.file_version); } Best regards, Rico