Hi all, I have searched through some of the previous postings on this list, but have not been able to find the solution - so I'll try here. I have a test case that (due to an error of course) tries to run code like this: class MyObject { public: virtual void f() {}; }; void MyFailingTestCase() { MyObject * a = NULL; a->f(); } When running these tests in release mode - the whole process is stopped by a windows dialog letting be know that there was a system error (Access Violation) and asks the user to click OK/Debug. I have also tried to pass the --catch_system_errors=yes, but that did not help I am running 1_33_1 version of the library. (libboost_unit_test_framework-vc80-mt-1_33_1.lib) Does anybody know a way around this problem? Olav