I am trying to build a helloworld program using bjam so that it can be imported into a python script. I get an error message that mentions a problem with the destructor being declared protected. Has anyone noticed this problem when building with Boost and Delta3D? C:\Program Files\boost\boost_1_35_0\boost/python/object/value_holder.hpp(67) : warning C4624: 'boost::python::objects::value_holder<Value>' : destructor could not be generated because a base class destructor is inaccessible I didn't get this error when building with the ide.