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EPUBCheck · Resources and references

RSC-017

Updated:

EPUBCheck RSC-017 is a warning message: “Warning while parsing file: ….” The parser found something questionable that does not stop it from reading the file.

The official message

Warning while parsing file: %1$s

Default severity
Warning. The EPUB is still valid, but something is likely to cause problems in some reading apps. EPUBCheck exits with 0 unless you pass --failonwarnings.
EPUBCheck version
5.4.0

%1$s, %2$s… are filled in with the file, value or element EPUBCheck found.

Typical causes

  • Constructs that are allowed but discouraged or suspicious; the text after the colon names it.

How to fix it

  • Read the text after the colon: EPUBCheck reports the file, the line and column, and the parser's own description of the problem.
  • Fix it if the message points at a real mistake; it does not make the EPUB invalid on its own.

Terms used here

Other RSC messages

  • RSC-016 Fatal Error while parsing file: …
  • RSC-015 A fragment identifier is required for svg use tag references.
  • RSC-020 "…" is not a valid URL (…)
  • RSC-013 Fragment identifier is used in a reference to a stylesheet resource.
  • RSC-012 Fragment identifier is not defined.
  • RSC-011 Found a reference to a resource that is not a spine item.

Message text and severity from EPUBCheck 5.4.0 (W3C, BSD-3-Clause). Explanation by EPUBLab.

FAQ

What does EPUBCheck RSC-017 mean?

EPUBCheck RSC-017 is a warning message: “Warning while parsing file: ….” The parser found something questionable that does not stop it from reading the file.

Is RSC-017 an error?

RSC-017 is reported as warning by default. The EPUB is still valid, but something is likely to cause problems in some reading apps. EPUBCheck exits with 0 unless you pass --failonwarnings.