Re: [Boost-users] [serialization] Can't compile archive I/O - 2

Robert, Thanks. THAT did it. It also explained to me why this had worked before then "suddenly" stopped working. In the intervening time, I had "optimized" my headers and #includes. Somewhere along the way, I got serialization headers before archive headers. Would it be useful to put something like #define BOOST_SERIALIZATION_HEADER_INCLUDED in each serialization header file and #ifdef BOOST_SERIALIZATION_HEADER_INCLUDED #error A Boost serialization header was included BEFORE an Boost archive header. #endif. in each archive header file? In the meantime, thanks for your help, thanks for the promptness of your help, and have warm, safe holidays. Merrill