<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV>Bonjour Paul,</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Unfortunately I do not have an answer for you concerning this external but I can offer you a work around using [expr].</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>expr $f1;</DIV><DIV>if ($f1>63, (127-$f1)/63, 1);</DIV><DIV>if ($f1<63, $f1/63, 1)</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Check out the attached patch.</DIV><DIV></DIV></BODY></HTML>