I'm sorry but EPUB (and InDesign's handling of EPUB) have come a very, very long way since CS4! I think that was the very first version of InDesign that tried to export something for EPUB and it was pretty lame. If you want to do EPUB export, you'll at least have to update to CS6. And InDesign CC and CC 2014 have made major positive changes since them.
It's not really going to be useful to try to do what you're doing in CS4, I'm afraid.
Thanks Steve. I wasn't sure if it was a link error with the graphics, related media, file size or just me. I'm assuming exporting to anything other than a PDF is equally unreliable other than upgrading. Do you know of any issues with exporting to a EPub, Mobi with a CS6 or Cloud version?
Again, thank you.
Your best bet is to view the very well done videos on EPUB created by Anne-Marie Concepcion on Lynda.com. You can get free viewing on Lynda.com for one week before you pay for a subscription. It's actually a real deal. There is lots to learn and her tutorials were created for CS5, 5.5, 6 and CC.
www.lynda.com. Search by her name.
Thanks. I downloaded the CC version to see what changes had been made to the application. I like the fact that there is now only one choice on the <File><Export> menu and then providing a variety of file-formats in the drop-down. I tried the ePub and while it worked, I was disappointed with the formatting that is a common complaint/observation by many users. While a PDF looks identical to the document being created, the EPub is different.
I'm going back to review the formatting of "objects" to see why there is so much difference to the final product. It would be great if you could get a preview screen to see what (if any) changes need to be made to make your spreads look identical to the finished product.
Also, thank you for your Lynda.com suggestion. It is a very useful online resource.
Thank you Steve for the endorsement of my lynda.com vids!
Just wanted to point out that I have a title there on CS4, too. (sorry, I don't remember getting a "Null Object" error, though ...)
InDesign CS4 to EPUB, Kindle and iPad