# EPUBCheck RSC-007w: Referenced resource … could not be…

Source: https://epublab.com/epubcheck/rsc-007w/ (updated 2026-11-03)

EPUBCheck RSC-007w is a warning message: “Referenced resource "…" could not be found in the EPUB.” A reference points to a file that is not in the EPUB; EPUBCheck reports this variant as a warning for references that do not break the publication's validity.

- Official message (EPUBCheck 5.4.0): Referenced resource "%1$s" could not be found in the EPUB.
- Default severity: Warning

## Typical causes

- A misspelled path, wrong case, or a file that was deleted or renamed after being referenced.

## How to fix it

- Correct the path or add the missing file to the EPUB and the manifest.
- Remove the reference if the target no longer exists.

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