[SmithBruce]

Hi
I have been using Calibre for several years to prepare my eBooks.
I always verify (HTML/ePUB) these using calibre.
I have never had any problems uploading these files to Amazon.
I have recently tried to upload to Kobo (same files) for the first time.
The ePUB was rejected due to errors – about 102 of them! Two of them ‘fatal’.
I understand what the errors are but not sure why they would not be ‘seen’ by the HTML and Amazon ePub book check?
Thanks, Bruce