I am trying to upload a book to PublishDrive. I've never come across this problem until now. It has something to do with the TOC I generated with Word 2016. I think I know what it means, maybe I don't, but I certainly have no idea how to fix it.
The book file is not valid and contains errors. Please check this page for more information:
https://code.google.com/p/epubcheck/wiki/Errors.
Common error messages and how to fix them.
Please contact us for help if you need it.
ERROR(RSC-005): EPUB/toc.ncx(50,56): Error while parsing file 'identical playOrder values for navPoint/navTarget/pageTarget that do not refer to same target'.
ERROR(RSC-005): EPUB/toc.ncx(56,56): Error while parsing file 'identical playOrder values for navPoint/navTarget/pageTarget that do not refer to same target'.
ERROR(RSC-012): EPUB/index_split_002.html(18,86): Fragment identifier is not defined.
ERROR(RSC-012): EPUB/toc.ncx(60,60): Fragment identifier is not defined.