Robert Ramey wrote:

I would be very suspicious of

BOOST_SERIALIZATION_BASE_OBJECT_NVP(AbstractTemplate<std::string>)

since the "name" is taken from the argument. Look at this macro definition and

expand it by hand.

That was it! I had previously made the substitution, but mistakenly included the '<', '>' and ':' anyway. Replacing the macro in Derived::serialize() with the expansion below solves the problem.

ar & boost::serialization::make_nvp("AbstractTemplateString",
boost::serialization::base_object<AbstractTemplate<std::string> >(*this));

Thanks a ton!