iBooks Author message: Main HTML file missing
I have created a simple widget with an HTML file that links to an external mp4 video. When trying to add this to iBooks Author, I get the message "main html file is missing". It is not, and as far as I am aware I have followed the instructions on http://support.apple.com/kb/HT5068.
The HTML file runs fine in Safari and other browsers.
I have found one other user with the same problem, but there was no reply, except a reference to the above article.
Can anyone help?
iBook