Originally Posted by drypen
Does your book have a lot of pictures in it? If not then just load the book into Calibre, go to your Calibre Library (C://users etc) & copy the book into another folder, go to the copy of the book and change the extension from azw3 to mobi or prc (whichever you prefer), delete the book from calibre, add the mobi or prc extension book and convert that. I've done it several times and the only time it didn't work is if the book was basically all pictures.
Greetings from Bogotá Colombia, I tried changing the extension to an e-book that came with MOBI extension AZW3 before attempting to convert it with Calibre (version 0.9.6) and it worked perfectly.
Thanks for the input,