This error might be caused by the error which have occurred in the process of automatically generating the file to publish at the previous time when you've registered or updated the content.
Please follow the following procedure to avoid this error.
1. Change the content status "Open" to "Closed" from the "Content List" screen.
2. Register the new resource file from the "Resource Management" screen.
3. From the "Content List" screen, click the "Update Content" button.
4. In the "PDF Office or Video Modification" item, select "Contain changes" and "Posted" to specify the registered resource file at previous 2..
5. Complete the content update and reopen.