Thanks for your information. I probably broke the cardinal rule of changing only one thing at a time and loaded new firmware onto the Kobo, changed the driver in Calibre and who knows what else all at the same time. Other things changed on my Kobo at the same time so I attributed it to the new firmware. Books that I had previously loaded and erased, now failed to load, but I must have loaded them with the "normal" driver and switched to the extended at some point later on.
I must have something else set wrong as the "Silently Ignore Failed Converions" option is checked (as shown by this screen shot) and still I get the error. Maybe it's the "Upload DRM-encumbered ePub files" I'll have to disable that and try.
It's interesting that it only happens with most Adobe DRM file, but not all. They must use differing versions of DRM.
At least I know the cause and can work around it now. Thanks!
John H. Reinhardt
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