I got the test to work but in my own code I am getting an &quot;unregistered void cast&quot; exception when trying to serialize the derived type. I moved the relevant classes into a separate test and made sure everything was identical to the test I made that does work (e.g. macro placement, include order) and I still get the exception. If I move the derived class definition into the header file it works. The function definitions don&#39;t even have to be inlined, they just need to be in the header. This is very weird. I am not sure you can help but if you have any ideas I would appreciate it.<br>
Thanks,<br>Daniel Roberts<br><br><br><br>I just separated things out and things seemed to work fine. &nbsp;The only thing<br>
that might<br>
or might not be an issue is header order:<br>
<br>
#include &lt;boost/serialization/type_<div id=":12h" class="ArwC7c ckChnd">info_implementation.hpp&gt;<br>
#include &lt;boost/serialization/extended_type_info_no_rtti.hpp&gt;<br>
#include &lt;boost/serialization/export.hpp&gt;<br>
#include &quot;polymorphic_derived1.hpp&quot;<br>
BOOST_CLASS_EXPORT(polymorphic_derived1)<br>
const char * polymorphic_derived1::get_key() const {<br>
return<br>
boost::serialization::type_info_implementation&lt;<br>
polymorphic_derived1<br>
&gt;::type::get_const_instance().get_key();<br>
}<br>
<br>
Notice I specified extended_type_info_no_rtti.hpp before export.hpp. &nbsp;If I<br>
remember<br>
correctly, if no type id system header is specified before export is<br>
encountered<br>
the system may take the rtti one as the default. &nbsp;Since we&#39;re not using<br>
defaults<br>
in this example, its probably not an issue.<br>
<br>
As far as I know, no one has ever asked a question about using EXPORT<br>
without<br>
rtti before - at least no one has ever had any questions about it. &nbsp;You may<br>
be<br>
treading new ground here.<br>
<br>
Robert Ramey</div>