Hello Robert Sorry to bother you again, but I am unable to use force_include correctly. I guest the makro BOOST_USED must be used, correct? I wrote BOOST_USED into each function header in the example. But it doesn't change anything. David On Feb 17, 2010, at 5:25 PM, Robert Ramey wrote:

This is likely due to the fact that a static linker will only include modules which have have been explicitly referred to. The library uses "force_include" to implement this when it can. You'll just have to figure out what the linker is excluding and make sure it's included.

Robert Ramey 830 Cathedral Vista Lane Santa Barbara, CA 93110 (805)569-3793 www.rrsd.com -----Original Message----- From: David Graf [mailto:davidagraf@gmail.com] On Behalf Of David Graf Sent: Wednesday, February 17, 2010 8:08 AM To: boost-users@lists.boost.org; Robert Ramey Subject: Re: [Boost-users] [Serialization] unable to fix UNREGISTERED CLASSexception

Hello Robert

I fixed the example. I had to add somewhere a virtual function. Otherwise, the polymorphism doesn't work.

Unfortunately, I have a new problem. If I put the code into a static library, the serialization from the outside doesn't work anymore. Then, I get a unregistered class exception. It only works when I put the code to execute the serialization into the cpp file where the classes are registered with BOOST_CLASS_EXPORT_GUID.

Again, I attached the example source code. The library is created with cmake. Therefore, you need to have cmake installed on your machine to test the example. The commands to build the example are cd /path/to/unpacked/testfolder mkdir build cd build cmake .. make

Funnily enough, the serialization from the outside (from the main function) works if the serialization in the cpp file is executed in advance.

The example works if the library is a dynamic library. If you wanna see this, you need to replace STATIC in CMakeLists.txt with SHARED.

David