Category:Described in year error

This is a tracking category. It is used to build and maintain a list or lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme. More information: This category is hidden on its member pages—unless the corresponding user preference (Appearance → Show hidden categories) is set. These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience. These categories also serve to aggregate members of several lists or subcategories into a larger, more efficient list (discriminated by classifications). Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

Administrators: Please do not delete this category as empty! This category may be empty occasionally or even most of the time.

This is an error tracking category for {{Category described in year}} templates, sorted by error code letter. Multiple errors may exist; only the last one assigned is displayed here.

Numeric error codes are (see T203355 for a known-issue):

• 1 : config missing a group key
• 2 : config missing a year key
• 3 : config missing a description key
• 4 : config missing a parent1 key

Alphabetic error codes are:

• C : Group:Century:Parent name in config is invalid. Acceptable case-sensitive values for 'century'-parents include: 'formal', 'Animals', 'Species', etc.
• D : Group:Decade:Parent name in config is invalid. Acceptable case-sensitive values for 'decade'-parents include: none; decade categories are deprecated.
• F : Group:Formal:Parent name in config is invalid. Acceptable case-sensitive values for 'formal'-parents include: 'Group', 'Animals', 'Fungi', 'Insects', 'Molluscs', 'Species', 'Taxa', 'paleontology'.
• G : Group:Formal:Parent freeform name in config does not exist.
• N : The category name is invalid. It does not match any of the acceptable "described in" formats: "YYYY", "the CCth century".
• P : The template call is outside of category-space and is missing a category parameter on which to operate.
• U : Unknown configuration: 'group' year/decade/century configuration missing.
• Y : Group:Year:Parent name in config is invalid. Acceptable case-sensitive values for 'year'-parents include: 'century', 'formal', 'Animals', 'Species', etc.

Please consult with the editor placing {{Category described in year}}, WP:Tree of Life, the related sub-WikiProject associated with that category, and/or recent editors of Module:Category described in year and/or Module:Category described in year/config.

Pages in this category should only be added by Module:Category described in year.