# EPUBCheck NAV-010: … nav must not link to remote…

Source: https://epublab.com/epubcheck/nav-010/ (updated 2026-11-03)

EPUBCheck NAV-010 is an error message: “"…" nav must not link to remote resources; found link to "…".” A nav in the navigation document (toc, page-list or landmarks) links to a remote resource; these must point inside the EPUB.

- Official message (EPUBCheck 5.4.0): "%1$s" nav must not link to remote resources; found link to "%2$s".
- Default severity: Error

## Typical causes

- A table of contents entry that links to a website.

## How to fix it

- Point the entry to a document in the EPUB, or move the web link into the content.

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