title: SP2-0310: unable to open file "dba_files_all.sql"
body: <p>Please advise.  This SQLPlus call:</p>
  
  <pre><code>SQL &gt; @dba_files_all 
  </code></pre>
  
  <p>...is not working.</p>
  
  <blockquote>
    <p>SP2-0310: unable to open file "dba_files_all.sql"</p>
  </blockquote>
  
  <p>How can I resolve the error?</p>