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Unexpected use of template {{16}} - see Template:16 for details.

Template documentation

Templates {{1}}, {{2}}, {{3}}, etc. warn readers/editors that a typo exists in the page they are reading/editing. If {{16}} is called, you probably meant the parameter 16 (as {{{16}}} with triple braces), but in fact only double braces were used, invoking {{16}}. In addition to a warning, it also adds pages to Category:Templates with incorrect parameter syntax. For more information on how template parameters work, see mw:Help:Templates#Parameters.

However, the most problems have been caused by omitting the first brace "{" of a parameter and getting {{16}}}, as invoking Template:16 +"}" rather than parameter 16. This can be an insidious problem, especially when the transclusion of Template:16 is hidden, so that the effect is invisible to the person editing a page. For that reason, Template:16 now issues a warning to the user.

With that warning, the prior invisible access to Template:16 can now be understood to be a formerly unseen problem coded within a page.

Note: this will also pick up several variations such as {{16|}} for {{{16|}}} and {{{16}}.

People should check what-links-here to see if anyone has accidentally invoked Template:16.

See also