Index: temp_moodle_dev/moodle/mod/chat/lib.php
===================================================================
diff -u -re5c2680d009c7515dc207bd000fe67ec4fc3348d -raca9f00eec05f594be36b6397b9c363742db6022
--- temp_moodle_dev/moodle/mod/chat/lib.php	(.../lib.php)	(revision e5c2680d009c7515dc207bd000fe67ec4fc3348d)
+++ temp_moodle_dev/moodle/mod/chat/lib.php	(.../lib.php)	(revision aca9f00eec05f594be36b6397b9c363742db6022)
@@ -126,7 +126,7 @@
 
     $pagetypes = page_import_types('mod/chat/');
     foreach($pagetypes as $pagetype) {
-        if(!delete_records('block_instance', 'pageid', $chat->id, 'pagetype', $pagetype)) {
+        if(!blocks_delete_all_on_page($pagetype, $chat->id)) {
             $result = false;
         }
     }
@@ -822,6 +822,7 @@
     return array('moodle/site:accessallgroups', 'moodle/site:viewfullnames');
 }
 
+
 /**
  * LAMS Function
  * This function clones an existing instance of Moodle chat
@@ -976,4 +977,5 @@
 
 }
 
+
 ?>