diff --git a/html/ops/error_summary.php b/html/ops/error_summary.php
new file mode 100644
index 0000000000..5aee8d491a
--- /dev/null
+++ b/html/ops/error_summary.php
@@ -0,0 +1,63 @@
+<?php
+// This file is part of BOINC.
+// http://boinc.berkeley.edu
+// Copyright (C) 2015 University of California
+//
+// BOINC is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License
+// as published by the Free Software Foundation,
+// either version 3 of the License, or (at your option) any later version.
+//
+// BOINC is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
+
+// generate a list of the most common exit codes
+// and links to N examples of each
+
+require_once("../inc/util.inc");
+require_once("../inc/result.inc");
+
+function compare ($x, $y) {
+    return $x->count < $y->count;
+}
+
+$t = time() - 7*86400;
+$results = BoincResult::enum_fields("id, exit_status", "server_state=5 and outcome=3 and exit_status<>0 and received_time>$t", "");
+$error_codes = array();
+foreach ($results as $r) {
+    $e = $r->exit_status;
+    if (array_key_exists($e, $error_codes)) {
+        $x = $error_codes[$e];
+        $x->count++;
+        $x->results[] = $r;
+        $error_codes[$e] = $x;
+    } else {
+        $x = new StdClass;
+        $x->count = 0;
+        $x->results = array($r);
+        $error_codes[$e] = $x;
+    }
+}
+
+uasort($error_codes, 'compare');
+
+page_head("Error summary");
+$i = 0;
+foreach ($error_codes as $code => $x) {
+    if ($i++ > 10) break;
+    echo "<br><br>Exit status".exit_status_string($code)." ($x->count results)\n";
+    $results = $x->results;
+    $j = 0;
+    foreach ($results as $r) {
+        if ($j++ > 10) break;
+        echo "<br>   <a href=result.php?resultid=$r->id>$r->id</a>\n";
+    }
+}
+page_tail();
+
+?>