Fatel Error: call to member object......

[xellos16]

I have just updated my forums to the newest update, and my members run into an error when they post a new post.

Fatal error: Call to a member function on a non-object in /home/rpg-game/public_html/forum/newreply.php on line <b>340

I don't undertand what the problem is though.

PHP Code:

// ### POST HAS ERRORS ###
                           $postpreview = construct_errors($errors); // this will take the preview's place
                           construct_checkboxes($newpost);
                           $_REQUEST['do'] = 'newreply';
                           $newpost['message'] = htmlspecialchars_uni($newpost['message']);
               }
               else if ($newpost['preview'])
               {
                           if ($forumperms & $vbulletin->bf_ugp_forumpermissions['canpostattachment'] AND $vbulletin->userinfo['userid'])
                           {
                                       // Attachments added
                                       $attachs = $db->query_read("
                                                   SELECT dateline, thumbnail_dateline, filename, filesize, visible, attachmentid, counter,
                                                               IF(thumbnail_filesize > 0, 1, 0) AS hasthumbnail, thumbnail_filesize,
                                                               attachmenttype.thumbnail AS build_thumbnail, attachmenttype.newwindow
                                                   FROM " . TABLE_PREFIX . "attachment AS attachment
                                                   LEFT JOIN " . TABLE_PREFIX . "attachmenttype AS attachmenttype USING (extension)
                                                   WHERE posthash = '" . $db->escape_string($posthash) . "'
                                                               AND userid = " . $vbulletin->userinfo['userid'] . "
                                                   ORDER BY attachmentid
                                       ");
                                       while ($attachment = $db->fetch_array($attachs))
                                       {
                                                   if (!$attachment['build_thumbnail'])
                                                   {
                                                               $attachment['hasthumbnail'] = false;
                                                   }
                                                   $postattach["$attachment[attachmentid]"] = $attachment;
                                       }
                           } 


that is the code block for the error message. the bold is the line that was called. can anyone help me with this? thanks.


Also is there a way that I can fix this with stripping my board of everything?