--- /dev/null
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html><head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>ERROR: The requested URL could not be retrieved</title>
+<style type="text/css"><!--
+ %l
+
+body
+:lang(fa) { direction: rtl; font-size: 100%; font-family: Tahoma, Roya, sans-serif; float: right; }
+:lang(he) { direction: rtl; float: right; }
+ --></style>
+</head><body>
+<div id="titles">
+<h1>ERROR</h1>
+<h2>The requested URL could not be retrieved</h2>
+</div>
+<hr>
+
+<div id="content">
+<p>The following error was encountered while trying to retrieve the URL: <a href="%U">%U</a></p>
+
+<blockquote id="error">
+<p><b>Precondition Failed.</b></p>
+</blockquote>
+
+<p>This means:</p>
+<blockquote>
+ <p>At least one precondition specified by the HTTP client in the request header has failed.</p>
+</blockquote>
+
+<br>
+</div>
+
+<hr>
+<div id="footer">
+<p>Generated %T by %h (%s)</p>
+<!-- %c -->
+</div>
+</body></html>