# EPUBCheck RSC-002: Required META-INF/container.xml…

Source: https://epublab.com/epubcheck/rsc-002/ (updated 2026-11-03)

EPUBCheck RSC-002 is a fatal error message: “Required META-INF/container.xml resource could not be found.” The archive has no META-INF/container.xml, the file that tells reading apps where the package document is.

- Official message (EPUBCheck 5.4.0): Required META-INF/container.xml resource could not be found.
- Default severity: Fatal error

## Typical causes

- The META-INF folder was left out when the book was zipped.
- The file is named or placed differently, such as meta-inf/Container.xml.

## How to fix it

- Add META-INF/container.xml with a rootfile whose full-path points to the package document, for example <rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>.
- Rebuild the archive with the mimetype file first and stored uncompressed, for example from the folder that contains the book: zip -X0 book.epub mimetype and then zip -rX9 book.epub META-INF OEBPS (use your own folder names).

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