Back to Error DirectoryW3C EPUBCheck Standard
OPF-099Critical Ingestion Error

The manifest must not list the package document.

The manifest must not list the package document.

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Fix all OPF-099 errors in your EPUB automatically

PreFlight checks for OPF-099 issues in memory and provides 1-click remediation during client-side packaging.

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What This Error Means in Plain English

EPUBCheck detected The manifest must not list the package document.. Digital reading systems and bookstores require standard conformance to ensure compatibility across all reading apps.

Why Retailers & EAA Regulations Block This File

Automated book distributors (Apple Books, Amazon KDP, Kobo, and IngramSpark) run strict EPUBCheck validation on ingest and reject non-compliant files.

Technical Specification: W3C EPUBCheck rule OPF-099: The manifest must not list the package document.

Manual Fix Instructions (for Sigil / Calibre)

  1. Locate the file and line flagged under rule OPF-099 in your EPUB editor (Sigil or Calibre).
  2. Apply the required syntax correction matching the OPF-099 specification.
  3. Re-pack and validate with PreFlight EPUB to confirm zero residual errors.