ive</var>, or <var class="Ar">extra_field_index</var>
      is not a valid extra file index (for ID
      <var class="Ar">extra_field_id</var>).</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr" href="libzip.html">libzip(3)</a>,
    <a class="Xr" href="zip_file_extra_field_delete.html">zip_file_extra_field_delete(3)</a>,
    <a class="Xr" href="zip_file_extra_field_set.html">zip_file_extra_field_set(3