Back to Error DirectoryW3C EPUBCheck Standard
OPF-076Critical Ingestion Error

The URI of preview collections link elements must not include EPUB ...

The URI of preview collections link elements must not include EPUB canonical fragment identifiers.

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Fix all OPF-076 errors in your EPUB automatically

PreFlight checks for OPF-076 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 URI of preview collections link elements must not include EPUB canonical fragment identifiers.. 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-076: The URI of preview collections link elements must not include EPUB canonical fragment identifiers.

Manual Fix Instructions (for Sigil / Calibre)

  1. Locate the file and line flagged under rule OPF-076 in your EPUB editor (Sigil or Calibre).
  2. Apply the required syntax correction matching the OPF-076 specification.
  3. Re-pack and validate with PreFlight EPUB to confirm zero residual errors.