Hi Loïc, The RTTI mechanism used by dynamic_cast relies upon the address of the type information structure. It appears that the DSO has a different type information structure for the object than the one being used in the dynamic_cast. Not good. What are the compiler/linker flags being used to make the .so? Does -fweak make a difference? If you are using -Bsymbolic ... don't use that. Consider doing a reinterpret_cast<B*>, since you are sure that it is a pointer to B in real life. Consider changing getFromSoFile() to return a B* instead of an A*. --Eljay
