Troubleshooting export to epub
Unfortunately, if your export fails, InDesign’s error messages are not always helpful.
Liz Castro offers a solution here for an error caused by having an ampersand in a URL in your InDesign document. (InDesign doesn’t create valid XML for the ampersand in a hyperlink.) (Check out Liz’s book, EPUB Straight to the Point.)
We’ll add other troubleshooting tips here as we find them.