I just received a huge application that uses boost for just about everything. I am receiving a debug assertion when trying to add program descriptions. To help isolate the error I have built a very simple example and am still getting the crash. For reference I am using boost 1.32. When I moved to any of the newer versions of boost this specific error goes away but I rack up a list of compiler errors a mile long. I am trying to fix this issue without moving to a newer version of boost because this is a legacy application and we have a minimum amount of time/budget. The last compiled version delivered by the old contractor does not have this error. This previous version was built with VS71 but we are using VS80 (with SP2) . could this be the difference? #include namespace po = boost::program_options; using namespace std; using namespace boost::program_options; int _tmain(int argc, _TCHAR* argv[]) { po::options_description desc("Allowed options"); desc.add_options() ("help,H", "produce help message") ; return 0; } Again a debug assert is triggered when calling 'add_options' with boost 1.32 but not in newer version using VS80 with SP2. Thanks! Nick --------------------------------------------------- Nicholas Clark (Nick) Sr. Computer Scientist ReallaeR, LLC ( http://www.reallaer.com/ www.ReallaeR.com) (800) 816-1913 ext.316 mailto:clark@reallaer.com clark@reallaer.com