> I believe that since you are forcing explicit instantiation, > you will probably have to instantiate ALL used templates, even if they > are templates used by an instantiated template. Maybe someone in the > know could confirm? Fair enough - no mean feat since the compiler nicely tells you what it's missing, I guess. It's just a puzzle to me that I didn't seem to have to do any extra "instantiating" in my library but I do in a test case - I'm obviously missing something subtle in the library. > Perhaps you aren't using the same flag in the compilation of your > program, and the code can see the template directly? Then you would > have the explicitly instantiated subclass, and because you aren't > telling the compiler to explicitly instantiate while compiling the > executable, it takes care of implicitly instantiating anything used by > the subclass? This is just a guess. Do you use that flag for > compilation of all units? In the example I sent earlier (as in the "real" case) I use -fno-implicit-templates for the library, but *not* for the program. And the program can definitely see all the template definitions as they're included in header files, so I don't think that'll be the case... John G