# EPUBCheck NCX-006: Empty text label in the NCX document

Source: https://epublab.com/epubcheck/ncx-006/ (updated 2026-11-03)

EPUBCheck NCX-006 is a usage message: “Empty "text" label in the NCX document.” An NCX navigation entry has an empty text label, so the table of contents shows a blank line.

- Official message (EPUBCheck 5.4.0): Empty "text" label in the NCX document
- Default severity: Usage

## Typical causes

- Entries generated from headings that had no text, such as image-only headings.

## How to fix it

- Give every navLabel a text, or remove the entry.

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