1204: overlay file <filename> does not match the .EXE file 
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  This message indicates that when the overlay manager opened the
  overlay file specified and created at link time, it was not a Blinker
  overlay file or it was not prepared at the same time as the currently
  executing .EXE file.

  This indicates that the correct copy of the overlay file has become
  overwritten by an older version, the newer version cannot be found in
  the current PATH, or the previous link was terminated before the
  overlay file was created correctly.