I've taken a new Pharo 3.0 image on pharo.org<p style="margin:0;padding:0;">Then I loaded Zinc-REST from your repository :&nbsp;http://smalltalkhub.com/#!/~SvenVanCaekenberghe/ZincHTTPComponents</p><p style="margin:0;padding:0;">I executed the code :&nbsp;<br /><p style="margin:0;padding:0;" > </p><br /><p style="margin:0;padding:0;">| server |</p><p style="margin:0;padding:0;">server := ZnServer startOn: 1700 .</p><p style="margin:0;padding:0;"><span class="Apple-tab-span" style="white-space: pre">        </span>server delegate:&nbsp;</p><p style="margin:0;padding:0;"><span class="Apple-tab-span" style="white-space: pre">                </span>(ZnRestServerDelegate new&nbsp;</p><p style="margin:0;padding:0;"><span class="Apple-tab-span" style="white-space: pre">                        </span>uriSpace: (ZnCallHierarchyRestUriSpace new&nbsp;</p><p style="margin:0;padding:0;"><span class="Apple-tab-span" style="white-space: pre">                                                        </span>rootClass: ZnExampleSumRestCall;</p><p style="margin:0;padding:0;"><span class="Apple-tab-span" style="white-space: pre">                                                        </span>yourself);&nbsp;</p><p style="margin:0;padding:0;"><span class="Apple-tab-span" style="white-space: pre">                        </span>yourself).</p><p style="margin:0;padding:0;">(ZnClient new) get: 'http://localhost:1700/appName?action=&amp;firstParameter=[&quot;Value&quot;]&amp;secondParameter=[&quot;Value&quot;]&amp;lastParameter={ &quot;Key&quot;:[&quot;firstValue&quot;,&quot;secondValue&quot;]}'</p><p style="margin:0;padding:0;"><br /></p><p style="margin:0;padding:0;">The error occured.</p><p style="margin:0;padding:0;">Is there something missing in my image ?</p><p style="margin:0;padding:0;"><br /></p><p style="margin:0;padding:0;">Thank you for your patience</p><p style="margin:0;padding:0;"><br /></p><blockquote style="padding-left: 5px; margin-left: 5px; border-left-color: #ff0000; border-left-width: 2px; border-left-style: solid">                                           &gt; Message du 06/03/14 17:20<br />&gt; De : &quot;Sven Van Caekenberghe&quot; <br />&gt; A : lanvin.kevin@laposte.net, &quot;Seaside - general discussion&quot; <br />&gt; Copie &agrave; : <br />&gt; Objet : Re: [Seaside] ZnUnknownHttpVersion<br />&gt;                                           <br />&gt; Kevin,<br />&gt; <br />&gt; On 06 Mar 2014, at 16:55, lanvin.kevin@laposte.net wrote:<br />&gt; <br />&gt; &gt; It's working on a seaside server, but not on a RestServer.<br />&gt; &gt; This code should show you the problem.<br />&gt; &gt; <br />&gt; &gt; | server |<br />&gt; &gt; server := ZnServer startOn: 1700 .<br />&gt; &gt;         server delegate: <br />&gt; &gt;                 (ZnRestServerDelegate new <br />&gt; &gt;                         uriSpace: (ZnCallHierarchyRestUriSpace new <br />&gt; &gt;                                                         rootClass: ZnExampleSumRestCall;<br />&gt; &gt;                                                         yourself); <br />&gt; &gt;                         yourself).<br />&gt; &gt; <br />&gt; &gt; <br />&gt; &gt; <br />&gt; &gt; <br />&gt; &gt; (ZnClient new) get: 'http://localhost:1700/appName?action=&amp;firstParameter=[&quot;Value&quot;]&amp;secondParameter=[&quot;Value&quot;]&amp;lastParameter={ &quot;Key&quot;:[&quot;firstValue&quot;,&quot;secondValue&quot;]}'<br />&gt; <br />&gt; Which works for me, sorry, it gives:<br />&gt; <br />&gt;   a ZnResponse(404 Not Found text/plain;charset=utf-8 34B)<br />&gt; <br />&gt; You still haven't said anything about which versions of Pharo/Zinc you are using, on which platform you are.<br />&gt; <br />&gt; Sven<br />&gt; <br />&gt; &gt; Regards.<br />&gt; &gt; _______________________________________________<br />&gt; &gt; seaside mailing list<br />&gt; &gt; seaside@lists.squeakfoundation.org<br />&gt; &gt; http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside<br />&gt; <br />&gt;                                                                                       </blockquote></p>