# `Cldr.Number.UnknownGrammaticalCaseError`
[🔗](https://github.com/elixir-cldr/cldr_numbers/blob/v2.38.1/lib/cldr/exception.ex#L110)

Exception raised when when an unknown
grammatical case is specified.

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*Consult [api-reference.md](api-reference.md) for complete listing*