"RIVASSEAU Jean Noel" wrote in message news:87F60F7FA02FF749AFB02BD9FCAA6B04DA7AA2@naserv31.nanterre.oberthurcs.com... Hello The following code (attached) demonstrate a problem that I have. I am trying to serialize via pointer to base class (MObject) which is abstract. The docs say that a compile error will occur when trying to do that. *** I think it should if your compiler can't support it. But I can't say for sure. I don't have any compile time errors emitted but the build fails at link time (it does not instantiate the save/load code for the abstract base class). The solutions provided in the docs are: write BOOST_IS_ABSTRACT(MObject): I did that and nothing changes; Or Implement is_abstract for your compiler. I do not understand what this means. Can you help me out ? Currently the only workaround I have is to not make the base class abstract, but I would like it to be abstract. *** its hard for me to follow what's going on here. One thing I did notice is that the I didn't see included in the places where it is used. I'm not sure if that's significant. Robert Ramey _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users