In Tikiwiki, files can be attached to ((Wiki)) pages, ((Trackers)), ((forum)) posts, etc...
For the wiki, to enable attachments you must:
1)Wiki attachments must have been enabled at __Administration:Wiki Attachments__
(As of 1.9.7 this checkbox does not appear in the list with the rest of the features)
__URL:__ yoursite.com/tiki-admin.php?page=wikiatt
2)Permissions wiki_view_attachments, and wiki_attach_files must be present in at least one of the ((Groups)) the user is assigned to.