1. Upload one attachment to some page
2. Delete the attachment by Administrator account
Page referred to the original page Attach tab
It says that the page named by the format "PageNameAttachmentName" does not exist, why don't you go and create it? For example, if you delete attachment "2012.png" from page "Wiki Center", the page will be referred to page "Wiki Center2012.png" and in View tab, it says "This page does not exist. Why don't you go and create it?".