r close error will be returned.
    </p>
      <p>
         The <code class="methodname">DbTxn::prepare()</code> <span>
            
            <span>
                method either returns a non-zero error value or throws an
                exception that encapsulates a non-zero error value on
                failure, and returns 0 on success.
            </span>
        </span>
         
         The errors that this method returns include the error values of <code class="methodname">Dbc::close()</code> a