d>            <td>
              target
            </td>
            <td>::</td>
            <td><strong>err</strong></td>
            <td>
                <p>The error object to be updated.</p>
            </td>
        </tr>
    </tbody>
  </table>


    </div>
  </div>

            <div class="card">
    <div class="card-header codesum"><span class="anchor" id="proc-form_lu_only"></span> <h3>private  subroutine form_lu_only(lu, u, err)  
</h3></div>
    <div class="card-body">
        <p>Extracts the L 