Hi Dallas, > If DSO C is throwing this exception but it's symbol is undefined, > could that be the problem? I am surprised that DSO C (RPC) does not have the typeinfo defined. Look at the *.o files for the DSO C (RPC) to see which one(s) have those undefined symbols. Then look carefully at the .cpp code for the .o file(s) to see what it is doing. Perhaps the code is only dealing with pointers or references. Perhaps the code has forward declarations of those things. > Any advice on how I can do this [kluge]? This problem was happening even > when I was using inline / auto template instantiation vs. explicit. In your main application: extern void DummyRoutineToForceInstantiateTypeinfo(int i); void DummyRoutineToForceInstantiateTypeinfo(int i) { if (i == 1) throw Execution::EventBody(); if (i == 2) throw DOCF::UserExceptionBody(); if (i == 3) throw Execution::TEventHandle<Execution::EventBody>(); if (i == 4) throw Execution::TEventHandle<DOCF::UserExceptionBody>(); } I think that will cause the compiler to emit the desired typeinfo into your main executable. > Thanks again for all the help! No problem. :-) Namaste. Sincerely, --Eljay