# EPUBCheck RSC-001: listed file not found, how to fix it

Source: https://epubcc.com/epubcheck/rsc-001/ (updated 2026-11-04)

EPUBCheck RSC-001 is an error message: “File "…" could not be found.” EPUBCheck looked for a file that the EPUB says exists and did not find it in the archive. The file is usually one the package document or the container lists, so reading apps will fail to load it too.

- Official message (EPUBCheck 5.4.0): File "%1$s" could not be found.
- Default severity: Error

## Typical causes

- A wrong path or a wrong upper/lower case in the name: paths inside an EPUB are case-sensitive.
- A file that was deleted or renamed after it was referenced.
- A file left out when the archive was built, for example by a zip command that skipped a folder.

## How to fix it

1. Check the path EPUBCheck reports against the files really in the archive, including case.
2. Restore the file or correct the reference.
3. Rebuild the archive and validate again.

## When it's not this

If a link or image reference in the content points to a missing file, EPUBCheck reports RSC-007.

## Sources

- EPUB 3.3, §5.6 Manifest section: https://www.w3.org/TR/epub-33/#sec-pkg-manifest (read 2026-11-04)

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