It may help is you give some sample code. Presently there are too many unknown(s) to give an accurate answer. I have some speculations; 1.) You may want to take a look at the test_no_rtti.cpp example for more details. $BOOST_ROOT/libs/serialization/test 2.) You could check the docs on EXPORT && TYPE_INFO as well. Cheers, Tim On Thu, Aug 21, 2008 at 5:01 AM, Hansi wrote:

Hello,

I have a problem to serialize a derived class. In some classes I use a shared_ptr<A> which acts as a interface for some other classes.

Til now I had the implementation in the header and it worked fine with the BOOST_CLASS_EXPORT(B) declaration after at the end of the header file where B was defined.

For performance reason (compile time) I have moved the serialization code from the header file (there is only the declaration) to the .cpp file (now I use also only the polymorphic_binary_archive). There I have also the declaration for the polymorphic_binary_archive

template void B::serialize(boost::archive::polymorphic_iarchive& ar, const unsigned int file_version); template void B::serialize(boost::archive::polymorphic_oarchive& ar, const unsigned int file_version);

After linking I have now some linker errors. First for the class B which is derived from A and for the class A. All linker errors use the binary_archive.

If I declare the "BOOST_CLASS_EXPORT(B)" at the end in the .cpp file I get only an linker error for class A. How I can solve this?

Best regards Hansjörg

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