[@robin-w Moderator 11 years, 11 months ago]

try

function bbp_single_replies_show($args) {
$args['posts_per_page'] = 3 ;
$args['max_num_pages'] = 1;
 return $args;
 }
 add_filter('bbp_before_has_replies_parse_args','bbp_single_replies_show');

I have not tested – I am quite busy at the moment – but keep trying !