Undefined variable: user_online

I am working on who is online plugin code. After installed the plugin I am getting this error: Notice: Undefined variable: user_online in C:\wamp\www\forums\addon_whosonline.php on line 66


and the line no 66 is:- if(isset($enableHidden) and $enableHidden==1) $w_logged_users[$user_id][]=$user_online;

any help?

Did you install this add-on manually, or used miniBB compiler?

This variable comes from bb_cookie.php file, if you have installed the add-on and enabled "Online Status" option. Since this feature has a very tricky installation (which is not for newbies!!!), we recommend to use Compiler to get it right.

I have installed add-on manually. Let me try through Compiler.

When you install add-ons manually, follow each and every step described in Readme. Obviously you missed the part for bb_cookie.php which is the most difficult if you install "online appearance" feature.