id/erroneous
    value when returning from a function call.
    Various diagnostic messages may also be generated by the library.
    All error messages are directed to a single global error handler
    routine that can be specified with a call to <tt>TIFFSetErrorHandler</tt>.
    Likewise warning messages are directed to a single handler routine
    that can be specified with a call to <tt>TIFFSetWarningHandler</tt>
  </p>
  <hr>
  <h2 id="fio">Basic File Handling</h2>
  <p>
    The library is modeled afte