title: R: list.files() does not find files in "special folder"
body: <p>I have the following problem: I want to list all files recursively in a given folder. But this folder contains a somehow special folder, where <code>list.files()</code> can't look into. However, <code>fs::dir_ls()</code> is able to look into the folder. See the example:</p>
  
  <pre><code>&gt; list.files(path, recursive = TRUE)
  [1] "???"                               "archive_folders.R"                
  [3] "archived_folder/archived_file.txt"
  &gt; 
  &gt; dir_ls(path, recurse = TRUE)
  U:/Eigene Dateien/R/archive_folders/archive_folders.R
  U:/Eigene Dateien/R/archive_folders/archived_folder
  U:/Eigene Dateien/R/archive_folders/archived_folder/archived_file.txt
  U:/Eigene Dateien/R/archive_folders/ааа
  U:/Eigene Dateien/R/archive_folders/ааа/archived_file.txt
  </code></pre>
  
  <p>I'm working on Windows 7 and looking into the properties of the <code>aaa</code> folder did not give a hint about the problem. So my question is twofold:</p>
  
  <ol>
  <li>Any ideas on what might be so special with the <code>aaa</code> folder?</li>
  <li>Is there any possibility that <code>list.files()</code> can find the files inside this special folder?</li>
  </ol>
  
  <p><strong>EDIT:</strong>
  The name of the folder <code>ааа</code> is in fact <em>not</em> <code>aaa</code>. Sounds confusing? The folder's name consists of <code>U+00430</code>, not the usual letter <code>a</code> (<code>U+0061</code>).</p>