# `Beancount.Checker.NotInstalledError`
[🔗](https://github.com/thanos/beancount_ex/blob/v0.6.0/lib/beancount/checker.ex#L18)

Raised when the configured `bean-check` executable cannot be located.

This signals an environment/setup problem, distinct from a ledger that
fails validation (which is returned as `{:error, %Beancount.Result{}}`).

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