'Missing NCX file fore pub 3.0' and 'You submitted and encrypted EPUB file'. Thanks!

[Greg Adkins]

Has anyone solved the last two items on this list? Exporting fixed epub 3.0, getting 'Missing EPUB 3.0 NCX'file' and 'you have submitted an encrypted EPUB'. Is there a fix for these items? Thanks!

[gabrielas41382796]

I am having the same problem with the "you have submitted an encrypted EPUB." Did you find a solution???

[James Gifford—NitroPress]

Where are you encountering this message?

Details of your ID version, platform (OS), the EPUB type (FXL vs reflowable) etc. might help.

[Hayley3097033898i0]

Same problem here. Missing NCX file, encrypted ePUB file.

The error messages appear when trying to upload ePUB to Draft2Digital (Agregator which delivers ebooks to multiple distributors).

I am using ID 17.4, platform MacOS Ventura 13.4.1, exporting a Fixed ePUB (children's picture book which does have embedded fonts from Canva. I'd rather not have to recreate the whole thing in ID if I can help it. I've successfully done it this way once before but can't recall whether an NCX error cropped up - there were various errors to work through but I think were mostly related to TOC creation, which I'm on top of this time around).

[James Gifford—NitroPress]

I can't sort out your workflow here. Can you list through how you created your pages and book? I''m getting that you created your pages (or book) in Canva, imported it to InDesign, and are using ID to create an FXL EPUB from that.

Specifics of what you created in Canva, what format you exported and then imported them to ID is probably they most important part here. (And I'll be honest, I can't think of a non-problematic, much less optimal, workflow using these elements.)

ETA: in a general sense, not all graphics formats are universally portable. By the time you get to graphic elements with embedded fonts, the possibilities for technical glitches, mismatches and incompatibility is quite high. EPUB demands something close to technical perfection for a valid export, and books built using a variety of tools and processes rarely get there.

[James Gifford—NitroPress]

And, another completely blind shot in lieu of further information: it's possible there is no good route for this project that goes through InDesign. With page/elements built in another app, using the old "build a bear" process with Sigil or Calibre, where all the elements of the EPUB are created more or less individually and hooked together, might be the only route.