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3 votes

epubcheck error: mimetype entry missing or not the first in archive

zip -X0 ../myEPUB.epub mimetype zip -9 -r ../myEPUB.epub META-INF OEBPS another common error i was getting was extra characters in mimetype 'Mimetype file should only contain the string 'application/...
Jonathan O'Gorman's user avatar
2 votes
Accepted

ePub validator is giving me errors. How can I address these reported errors?

Unfortunately, there's a lot more wrong than the errors listed. The first line needs to be (adding the question mark): <?xml version="1.0" encoding="utf-8" standalone="no"?> After you correct ...
idiotprogrammer's user avatar
2 votes

epubcheck error: mimetype entry missing or not the first in archive

As the accepted answer states, the mimetype file should be stored uncompressed in the archive. For those looking for a programmatic way to validate and package an EPUB I recommend using the Java ...
valentin's user avatar
  • 121
1 vote

Why does EPUBCheck report warnings and errors for ISO8601 date-time string?

This happens because at least two parts of EPUBCheck dislike the ISO8601 timezone format in different ways. In the dc:date context, EPUBCheck is OK with "2020-12-09T14:06:40-07:00" but not ...
Ray N. Franklin's user avatar
1 vote
Accepted

What tag use is expected in an ePub toc.xhtml?

If you are not going to use a ncx, my answer is no, you don't need to change this xhtml file at all. I'm going to guess here. ns:ncx means that you are using a namespace called "ncx." A namespace is ...
idiotprogrammer's user avatar
1 vote

epubcheck error: mimetype entry missing or not the first in archive

Here are the steps I used to force the "mimetype" file to be the first in the EPUB archive using 7-Zip in Windows: Make a copy of your EPUB (zip) file (e.g. MyBookCopy.epub), so to not ...
Pi Da's user avatar
  • 111
1 vote

epubcheck error: mimetype entry missing or not the first in archive

7-zip sorts files by names rename mimetype to ##mimetype Add to archive... ##mimetype Archive: book.zip Archive format: zip Compression level: Store OK Add to archive... the other folders META_INF ...
fstil's user avatar
  • 11

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