Looks like almost all issues re borland 5.82 serialization have been cleared up due to your efforts. Thanks a lot. Just to demonstrate that no good dead goes unpunished, you might want to look into the following. test variant fails - I think this is something in the variant library itself and not addressable from within the serialization libary or tests. test_no_rtti - this has always failed with bcb 5.64 and still fails with 5.82. I had given up hope. But I think I saw it pass with bjam V2. I checked the command line switches and they were different. So I'm wondering if some tweaking of the command line switches might help bcb passing on this test as well as possible others in other libraries. Anyway - thanks again for your hard work and successful results. Robert Ramey