--- notify.old.module	2008-11-08 13:38:56.000000000 -0600
+++ notify.module	2008-11-11 06:49:27.000000000 -0600
@@ -422,10 +422,12 @@ function _notify_send() {
     }
 
     // Fetch new comments.
-    $cresult = db_query(db_rewrite_sql('SELECT c.nid, c.cid, c.subject, c.name FROM {comments} c INNER JOIN {node} n ON c.nid = n.nid WHERE c.status = %d AND c.timestamp > %d AND c.timestamp <= %d '. $reqntype . ' ORDER BY c.nid, c.timestamp', 'c'), COMMENT_PUBLISHED, $period, time());
     $comments = array();
-    while ($comment = db_fetch_object($cresult)) {
-      $comments[$comment->nid][] = $comment;
+    if (module_exists('comment')) {
+        $cresult = db_query(db_rewrite_sql('SELECT c.nid, c.cid, c.subject, c.name FROM {comments} c INNER JOIN {node} n ON c.nid = n.nid WHERE c.status = %d AND c.timestamp > %d AND c.timestamp <= %d '. $reqntype . ' ORDER BY c.nid, c.timestamp', 'c'), COMMENT_PUBLISHED, $period, time());
+        while ($comment = db_fetch_object($cresult)) {
+          $comments[$comment->nid][] = $comment;
+        }
     }
 
     $node_body = '';