# EPUBCheck OPF-097: Resource … is listed in the manifest…

Source: https://epublab.com/epubcheck/opf-097/ (updated 2026-11-03)

EPUBCheck OPF-097 is a usage message: “Resource "…" is listed in the manifest, but no reference to it was found in content documents.” A file is listed in the manifest but nothing in the content references it.

- Official message (EPUBCheck 5.4.0): Resource "%1$s" is listed in the manifest, but no reference to it was found in content documents.
- Default severity: Usage

## Typical causes

- Unused images, fonts or stylesheets left after editing.

## How to fix it

- Delete the file and its manifest item if it is not needed; if it is, reference it from the content.

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