[CONNECT C++] Possible Issue with CONNECT U5 SDK

I'm including the file:

#include <DgnPlatform\DetailingSymbol\DetailingSymbolHandlers.h>

and when the compiler runs, I see errors relating to "ViewElementHandlerSubTypes.h". Can anyone confirm this ?

ViewElementHandlerSubTypes.h(47): error C3646: 'GetCalloutType': unknown override specifier

ViewElementHandlerSubTypes.h(47): error C2275: 'Bentley::ElementHandleCR': illegal use of this type as an expression

...

Thanks,

Bruce