<br> "If <code class="scheme"><span class="variable">f</span></code> ever returns a true value, it must continue to return a true value. "<br> <br> Until when? Until scheme_block_until() returns?<br> <br> Hans<br> <br> <br> <br> <br> <br> <br> </body> </html> --------------020700070801040101000604--