# EPUBCheck OPF-091: The item href URL must not have a…

Source: https://epublab.com/epubcheck/opf-091/ (updated 2026-11-03)

EPUBCheck OPF-091 is an error message: “The item href URL must not have a fragment identifier.” A manifest item's href contains a fragment (#…); manifest items must point to whole files.

- Official message (EPUBCheck 5.4.0): The item href URL must not have a fragment identifier.
- Default severity: Error

## Typical causes

- An href copied from a link, such as chapter1.xhtml#start.

## How to fix it

- Remove the #fragment from the manifest href.

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