title: pdftk update_info command raising a warning which I don't understand
body: <p>I'm trying to use the <code>update_info</code> command in order to add some bookmarks to an existing pdf's metadata using <code>pdftk</code> and powershell.</p>
  <p>I first dump the metadata into a file as follows:</p>
  <p><code>pdftk .\test.pdf dump_data &gt; test.info</code></p>
  <p>Then, I edit the <code>test.info</code> file by adding the bookmarks, I believe I am using the right syntax. I save the <code>test.info</code> file and attempt to write the metadata to a new pdf file using <code>update_info</code>:</p>
  <p><code>pdftk test.pdf update_info test.info output out.pdf</code></p>
  <p>Unfortunately, I get a warning as follows:</p>
  <blockquote>
  <p>pdftk Warning: unexpected case 1 in LoadDataFile(); continuing</p>
  </blockquote>
  <p><code>out.pdf</code> is generated, but contains no bookmarks. Just to be sure it is not a syntax problem, I also ran it without editing the metadata file, by simply overwriting the same metadata. I still got the same warning.</p>
  <p>Why is this warning occurring? Why are no bookmarks getting written to my resulting pdf?</p>