Thread:Extension talk:SemanticComments/Error in MW 1.23, SMW 2.0/reply (3)

the fix was easy: in /extensions/SemanticComments/specials/Comment/CE_CommentSpecial.php on line 37

replace require_once( $IP . "/includes/SpecialPage.php" ); with require_once( $IP . "/includes/specialpage/SpecialPage.php" );