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


          </li>
          <li class="list-group-item">
                <h3>
    private  subroutine form_lu_only_cmplx(lu, u, err)  

    </h3>
  <p>Extracts the L and U matrices from the condensed [L\U] storage format 
used by the lu_fact