Index: content_access.rules.inc
===================================================================
--- content_access.rules.inc	(revision 281)
+++ content_access.rules.inc	(working copy)
@@ -29,7 +29,12 @@
  */
 function _content_access_rules_check_setting($node) {
   if (!content_access_get_settings('per_node', $node->type)) {
-    rules_log(t("Can't set per content permissions for content type @type. Make sure to have per content settings activated for content types you want to alter access control for.", array('@type' => node_get_types('name', $node->type))), TRUE);
+    if (module_exists('rules')) {
+      rules_log(t("Can't set per content permissions for content type @type. Make sure to have per content settings activated for content types you want to alter access control for.", array('@type' => node_get_types('name', $node->type))), TRUE); 
+    }
+    else{
+      drupal_set_message(t("Can't set per content permissions for content type @type. Make sure to have per content settings activated for content types you want to alter access control for.", array('@type' => node_get_types('name', $node->type))), TRUE);
+    }
     return FALSE;
   }
   return TRUE;