Help:Cite errors/Cite error references missing key

This page will help you to fix the cite error message:

• If you have read this help page and find something missing or confusing, please discuss it at the main talk page.
• Please reference this page and the page where you have the problem so we can understand your issues.
• For basic information on the footnotes system, see Referencing for beginners; for advanced help, see Footnotes.

Overview

Further information: Wikipedia:Manual of Style (footnotes)

A footnote used multiple times may be defined with a name:

<ref name="foo">content</ref>

To invoke a named footnote:

<ref name="foo" />

References may also be defined within the reference list:

{{reflist|refs=
<ref name=rename1>refcontent1</ref>
<ref name=rename2>refcontent2</ref>
<ref name=rename3>refcontent3</ref>
<ref name=rename4>refcontent4</ref>
}}

List-defined references may be invoked by the standard markup or by use of {{r}}.

Issues and resolution

All references defined in the reference list must be invoked in the content. Unused references must be removed or commented out.

Bugs

Tracked in Phabricator
Task T24635

Tracked in Phabricator
Task T26600

• Template:Bug Multiple problems with refs inside <references>...</references> blocks.

• Template:Bug The first defined reference that is not invoked will show an incorrect error message.

Examples

There are three references defined in the list, but none are invoked in the content. Note the spurious error for the first reference named ipsum:

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

==References==
{{reflist|refs=
<ref name=ipsum>Reference1</ref>
<ref name=minim>Reference2</ref>
<ref name=dolor>Reference3</ref>
}}

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

References

If only one reference is defined but not invoked, then only the spurious error is shown:

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

==References==
{{reflist|refs=
<ref name=ipsum>Reference1</ref>
}}

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

References