title: Visual C++ program crashed, but no dumpfile generated. why?
body: <p>I have a very strange situation.
  I'm running IOCP Server Program programmed by Visual studio 2010 in C++.</p>
  
  <p>It uses 'minidump', so When there is a logical bug like pointer misuse, Program crashes with dump file so I can find out where is the crash point in codes.</p>
  
  <p>Sometimes (very rarely), the program crashes and there are no dump files. </p>
  
  <p>What situation makes <code>SetUnhandledExceptionFilter()</code> not working? 
  Anybody knows this problem? I can't figure out.</p>