Category:Articles using invalid arguments in template calls

The following pages use templates in ways that the template code has deemed invalid.

Viewing Warnings
Pages in this category should have editor warnings that describe which template usages are invalid and how to fix them.

Warning messages are displayed above page previews, unless the preference  is enabled. In this case, the warnings can also be viewed in the Lua logs at the very bottom of the preview page beneath the editing area, under "parser profiling data."

Unfortunately warning messages cannot be viewed when using VisualEditor, even in source mode. To switch to the regular source editor, go to Special:Preferences,  tab, and from the   dropdown select.

Transcluded Errors
If a page appears in this category but no editor warning appears when previewing the page, it may be that the error is being transcluded from another page. This happens quite often with errors in Data:Translations being transcluded into articles via, and on redirect pages that use.

In this case, you can use Special:ExpandTemplates to find out where the error is coming from. Put the name of the article in the context title field and the article wikitext in the input wikitext field, then submit the form. Search for  in the Result section. The category name will appear where the error is.

Once the transcluded page (e.g. Data:Translations) is fixed, you must null edit the transcluding page (e.g. an article with Nomenclature) to clear it from this category.