Email notification errors

sid_bu

My users are getting notification links through their emails but once they click the notification link, they were uable to see new comments because of following 3 error messages: 1) Notice: Trying to get property of non-object in //nas-001\winspace002\10-reflectlearn.org\www\Vanilla\library\Vanilla\Vanilla.Control.CommentGrid.php on line 71 2) Notice: Trying to get property of non-object in //nas-001\winspace002\10-reflectlearn.org\www\Vanilla\extensions\AddComments\default.php on line 31 3) Notice: Trying to get property of non-object in \\nas-002\winspace002\10-reflectlearn.org\www\Vanilla\comments.php on line 42 I appreciate any help. thanks