title: Unable to import previously working SAS-formats files using R-package 'haven'
body: <p>Around a year ago, I used the 'haven'-package to import two .sas7bdat files along with their respective .sas7bcat formats and it worked wonderfully.</p>
  
  <p>For some reason, however, it does not any longer even though all the SAS-files incl. format files have remained unchanged since then.</p>
  
  <p>When I try running the code now, R gives me the following error:</p>
  
  <blockquote>
    <pre class="lang-none prettyprint-override"><code>Error in df_parse_sas_file(spec_data, spec_cat, encoding = encoding,
    catalog_encoding = catalog_encoding,  :    Failed to parse P:/SAS
    files/formats.sas7bcat: Invalid file, or file has unsupported features.
  </code></pre>
  </blockquote>
  
  <p>R and the 'haven'-package have been reinstalled to their newest versions since the first time when it worked, so I imagine that this might be the reason since all the SAS-files and the code remains unchanged.</p>
  
  <p>For this reason, I tried to reinstall the old version of 'haven' but cannot since this apparently requires a manual installation of 'Rtools' which is not allowed on my computer, so I am a bit stuck here.</p>
  
  <p>Any suggestions will be greatly appreciated, thanks.</p>