[rpitcairn]

I have used Calibre before to convert a pdf to an ebook for kindle. Recently purchased the Oasis reader and now when I make a book and transfer to my device (Oasis) the book will not be recognized, therefore can not be opened. I mean that Oasis does not recognize it after the file has been transferred. Have tried this with more than one book and same outcome.
Has anyone else seen this? Is there something about the Oasis I should know?
Thanks for any help.
— Richard