Error Type	Correction
1 asset was not validated successfully because it had problems: b1bdc403-9f8e-4771-8271-204b22a7a4a8.epub  ERROR ITMS-9000: b1bdc403-9f8e-4771-8271-204b22a7a4a8.epub: C:/Temp/vfbn0njy.40e/b1bdc403-9f8e-4771-8271-204b22a7a4a8.epub/OPS/package.opf(4): [RSC-005] Error while parsing file 'attribute "ns0:role" not allowed here; expected attribute "dir", "id" or "xml:lang"'. (For more information refer to http://support.apple.com/kb/HT6213)	Check out this page from iBooks support: https://support.apple.com/en-us/HT202973. It's about the namespace. Usually attributes have to do with the opf file having invalid items. Sometimes the NCX file kicks back this error. Steps to confirm these are correct: 1. Open the NCX, and review the IDs and Play Order. 2. If the IDs match the Play Order, add “ch” before the # in the ID – do not change the Play Order. 3. If some IDs match each other, add some value after the # in the ID. Ex – if id=”015” is used twice, change the second listing to id=”015_2”. Again, do not change the Play Order. To rezip the file: Cntrl + Click on mimetype, then ctrl + click on OEBPS, META-INF Right click on mimetype, then click Send To > Compressed (zipped) Folder Rename .zip file to .epub Run through ePubCheck