Broken Links Checker
When scraping your web site to find the internal links, we may find broken links, for example internal pages that return a 404 Not Found error, a Timeout, or any other kind of non-document errors.
In this case, a Non-document error tab will be shown, where you can see the unreachable pages:
Where's it linked from?
Each unreachable page will show where it was linked from, so you can fix the broken link in its origin:
These non-document errors come from the HTML checker, as Rocket Validator does not have a broken link checker of its own.