This is a tracking category for CS1 citations that have |arxiv= errors.
Check |arxiv= value
When Citation Style 1 and Citation Style 2 templates contain |arxiv=, a test is done to see if the arXiv identifier conforms with the arXiv identifier scheme. The identifier is checked for a valid number of digits in the article id; valid year and month values; and properly-placed hyphens, slashes, and dots.
To resolve this error, ensure that the |arxiv= value is correct.
Pages with this error are automatically placed in Category:CS1 errors: arXiv.
|arxiv= required
{{cite arXiv}} requires one, but not both, of the identifier parameters |arxiv= or |eprint= to specify an arXiv identifier.
To resolve this error, ensure that the template has |arxiv= or |eprint= with a properly constructed value.
Pages with this error are automatically placed in Category:CS1 errors: arXiv.