# EPUBCheck OPF-011: itemref can’t have both…

Source: https://epublab.com/epubcheck/opf-011/ (updated 2026-11-03)

EPUBCheck OPF-011 is an error message: “itemref can’t have both page-spread-right and page-spread-left properties.” A spine itemref has both page-spread-right and page-spread-left properties, which contradict each other.

- Official message (EPUBCheck 5.4.0): itemref can’t have both page-spread-right and page-spread-left properties.
- Default severity: Error

## Typical causes

- Properties added twice by hand or by a tool when setting up a fixed-layout spread.

## How to fix it

- Keep only the side where the page should appear (page-spread-left or page-spread-right).

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