On my Iconia A200, I'm using CC and Moon+ Pro. I am unable to open any format other than PDF in Moon+ from within CC. Other formats report that no app is answering the call.
What I've done:
Uninstalled and reinstalled both apps. No luck.
Cleared data on both apps. Still no luck.
Moon+ can import and open these files (epubs) just fine, and I can also open them from a file browser - just tap the file and it opens in Moon+. But I still can't get them to open from within CC. This makes me sad.