Template:Error/doc

Use this template to show an error message, when a template is used in a wrong way. Articles, which uses templates in a wrong way, will be added automatically by this template to the Misused templates category.

Parameters

 * 1. unnamed: Add the template's name, which uses this template.
 * 2. unnamed: Add the parameter's name, you're are checking for. The strings 11 and 21 show a message about too many unnamed parameters.

Usage
See the template's testcases: