Error during DISPLAY on file

  Explanation:  This error indicates an unexpected error condition
  during the execution of a DISPLAY statement.  Under normal
  operation, this message should never appear.

  User Action:  Check to see if there is any external interference
  with the display device.  For all device types, possible problems
  may include a device that is off line or a user who does not have
  the necessary privileges to write to a display device.  If the
  device is a file, possible problems may include a full disk or
  disk quota exceeded.