title: Cannot open file nor connection: "rb" errors while trying to read an excel from the computer
body: <pre><code>readxl::read_excel("C:/Users/administrador/Documents", 
                     "DataImport_hatchesSDA_marc")
  </code></pre>
  
  <blockquote>
    <p>Error in file(con, "rb") : cannot open the connection
    In addition: Warning message:
    In file(con, "rb") :
      cannot open file 'C:/Users/administrador/Documents': Permission denied</p>
  </blockquote>