We have validate an ePub files in the epubcheck-3.0.1 version in windows 8.1 system, and we received below error message in the epub files. could you please help for us?

ERROR: 9088098774672.epub: Mimetype entry missing or not the first in archive Validating against EPUB version 3.0

Check finished with warnings or errors


This error is not related to Windows itself. This means that ePub file is bad compressed. Decompress this file and compress it via this tool ePubPack

  • We have properly compressed in the ePub file in windows 8 machine. but we received the same error in the epubchecker 3.0.1. Can you please try in windows 8 machine and let me know the solution? – Prabhu Feb 20 '15 at 8:00
  • I check it an minute ago and it is working. – Glorifind Feb 20 '15 at 8:38

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