I have tried to use the Boost 1.33 Unit test FP comparison with MSVC 8.0 beta 2 and the example test_fp_comparisons.cpp works as expected in release mode (runs 5 tests ok) (Though not auto - Had to run it myself). Defines WIN32;NDEBUG;_CONSOLE but in debug mode I get: ------ Rebuild All started: Project: unit_test_framework, Configuration: Debug Win32 ------ Deleting intermediate and output files for project 'unit_test_framework', configuration 'Debug|Win32' Compiling... xml_report_formatter.cpp xml_log_formatter.cpp unit_test_suite.cpp unit_test_parameters.cpp unit_test_monitor.cpp unit_test_main.cpp unit_test_log.cpp test_tools.cpp results_reporter.cpp results_collector.cpp progress_monitor.cpp plain_report_formatter.cpp framework.cpp i:\boost_1_33_0\boost/test/impl/framework.ipp(313) : warning C4244: 'initializing' : conversion from 'time_t' to 'unsigned int', possible loss of data execution_monitor.cpp compiler_log_formatter.cpp Generating Code... i:\boost_1_33_0\boost\lexical_cast.hpp(223) : warning C4701: potentially uninitialized local variable 'result' used Creating library... Creating browse information file... Microsoft Browse Information Maintenance Utility Version 8.00.50215 Copyright (C) Microsoft Corporation. All rights reserved. Build log was saved at "file://c:\temp\boost_test_library\Debug\BuildLog.htm" unit_test_framework - 0 error(s), 2 warning(s) ------ Rebuild All started: Project: test_fp_comparisons, Configuration: Debug Win32 ------ Deleting intermediate and output files for project 'test_fp_comparisons', configuration 'Debug|Win32' Compiling... test_fp_comparisons.cpp Linking... Auto run test Running 5 test cases... Detected memory leaks! Dumping objects -> {150} normal block at 0x003163F8, 12 bytes long. Data: <long double > 6C 6F 6E 67 20 64 6F 75 62 6C 65 00 {149} normal block at 0x003163C0, 8 bytes long. Data: < c1 0a1 > F8 63 31 00 30 61 31 00 {139} normal block at 0x00316168, 7 bytes long. Data: <double > 64 6F 75 62 6C 65 00 {138} normal block at 0x00316130, 8 bytes long. Data: <ha1 `41 > 68 61 31 00 60 34 31 00 {126} normal block at 0x00313498, 6 bytes long. Data: <float > 66 6C 6F 61 74 00 {125} normal block at 0x00313460, 8 bytes long. Data: < 41 > 98 34 31 00 00 00 00 00 Object dump complete. Build log was saved at "file://c:\temp\boost_test_library\Debug\BuildLog.htm" test_fp_comparisons - 0 error(s), 0 warning(s) ========== Rebuild All: 2 succeeded, 0 failed, 0 skipped ========== _CONSOLE;WIN32;_DEBUG,BOOST_TEST_NO_AUTO_LINK are defined. Can anyone throw any light on this please? Thanks Paul Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB +44 1539 561830 +44 7714 330204 mailto: pbristow@hetp.u-net.com www.hetp.u-net.com