I am trying to get the regressions straight for msvc-6.5. I discovered, that some of the test's test are failing with msvc-6.5. I tracked this down to the fact, that the boost_unit_test_framework cannot be built as a DLL. In fact the compilation of compiler_log_formatter faults with error C2504 : test_suite : base class undefined altough the base class is being properly declared. I suspect that the problem is, that the base class contains some template classes which are not exported. Trying to export them unfortunately doesn't resolve the problem. I further suspect, that it isn't possible to export templated classes with msvc-6.5. But I am not sure on that. Is this a known issue? Are there any work-arounds possible? If not: 1) Should the tests be omitted for msvc-6.5? 2) Are other boost regression test affected? Roland