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EPUBCheck · Package document (OPF)

OPF-096

Updated:

EPUBCheck OPF-096 is an error message: “Non-linear content must be reachable, but found no hyperlink to "…".” A document marked linear="no" in the spine is not linked from anywhere, so readers cannot reach it.

The official message

Non-linear content must be reachable, but found no hyperlink to "%1$s".

Default severity
Error. The EPUB breaks a rule of the specification and is invalid. Stores and Send to Kindle may reject it, and EPUBCheck exits with status 1.
EPUBCheck version
5.4.0

%1$s, %2$s… are filled in with the file, value or element EPUBCheck found.

Typical causes

  • Notes, answers or appendices marked non-linear without a link from the text or table of contents.

How to fix it

Terms used here

Other OPF messages

  • OPF-097 Resource "…" is listed in the manifest, but no reference to it was found in content documents.
  • OPF-093 The "media-type" attribute is required for linked resources located in the EPUB container
  • OPF-099 The manifest must not list the package document.
  • OPF-092 Language tag "…" is not well-formed: …
  • OPF-100 The "…" property only applies to pre-paginated content.
  • OPF-091 The item href URL must not have a fragment identifier.

Message text and severity from EPUBCheck 5.4.0 (W3C, BSD-3-Clause). Explanation by EPUBLab.

FAQ

What does EPUBCheck OPF-096 mean?

EPUBCheck OPF-096 is an error message: “Non-linear content must be reachable, but found no hyperlink to "…".” A document marked linear="no" in the spine is not linked from anywhere, so readers cannot reach it.

Is OPF-096 an error?

OPF-096 is reported as error by default. The EPUB breaks a rule of the specification and is invalid. Stores and Send to Kindle may reject it, and EPUBCheck exits with status 1.