title: RTE: 8012 "The device is not open"
body: <p>I have a VB6 program that uses MSComm control to send/receive data via COM port. I occasionally get this runtime error 8012 "The device is not open".<br /><br />I have found <a href="http://msdn.microsoft.com/en-us/library/aa259389%28v=vs.60%29.aspx" rel="nofollow">reference</a> to this error but I can not find any reference to exactly what would cause this error. I would like to know the possible reasons that cause this error to occur?</p>
  
  <p>[EDIT]: I don't have access to its source code.</p>