Execute scheduled task: Cleanup old sessions (core\task\session_cleanup_task) ... started 13:55:37. Current memory use 21.7MB. ... used 19 dbqueries ... used 0.014662981033325 seconds ... used 19 dbqueries ... used 0.014762163162231 seconds Scheduled task failed: Cleanup old sessions (core\task\session_cleanup_task),error/argh Backtrace: * line 67 of /lib/cronlib.php: call to cron_run_inner_scheduled_task() * line 61 of /admin/cli/cron.php: call to cron_run()