Even simpler, open your epub in Sigil and thn save it to a new name such as junk.epub.
Exit from Sigil and then do the following.
1. rename junk.epub to junk.zip
2. unzip junk.zip and look inside the resulting folder.
3. in that folder look for and open the OEBPS folder
4. copy the content.opf file to your Desktop
5 zip up the content.opf to create content.opf.zip and upload just that file here
That will allow me to see what if anything is going wrong.
Thanks,
KevinH
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