I have a mfc dialog program. when active configuration is Debug my program work correct and without any problem. But when I select Release as active configuration my program build without any error, with some warnning about lost data in double to float converting. But when I want to run program my program dialog don't appear and instead a windows error dialog with Send and Don't Send. When I press debug on windows error message, it say that a divide by zero happen. I don't have any divide by zero in my code.