# EvaluationRunErrors A summary of the failures encountered during an evaluation run. ``` struct EvaluationRunErrors ``` ## Overview Retrieved via [`errors`](/documentation/Evaluations/EvaluationResult/errors). ## Topics ### Instance Properties [`var anyInferenceProduced: Bool`](/documentation/Evaluations/EvaluationRunErrors/anyInferenceProduced) Whether any sample produced a subject. [`var evaluatorFailureCount: Int`](/documentation/Evaluations/EvaluationRunErrors/evaluatorFailureCount) The total number of evaluator invocations that threw. [`var failingEvaluatorTypes: Set`](/documentation/Evaluations/EvaluationRunErrors/failingEvaluatorTypes) The set of evaluator type names that threw at least once. [`var hasFailures: Bool`](/documentation/Evaluations/EvaluationRunErrors/hasFailures) Whether this represents any failure worth persisting. [`var inferenceFailureCount: Int`](/documentation/Evaluations/EvaluationRunErrors/inferenceFailureCount) The number of samples whose subject failed to be produced. [`var metricsNotFound: [String]`](/documentation/Evaluations/EvaluationRunErrors/metricsNotFound) Metric names referenced by `MetricsAggregator` that no evaluator produced. ### Type Properties [`static let clean: EvaluationRunErrors`](/documentation/Evaluations/EvaluationRunErrors/clean) Used as the default when loading a file that carries no `runErrors`. ## Relationships ### Conforms To [`Decodable`](/documentation/Swift/Decodable) [`Hashable`](/documentation/Swift/Hashable) [`Sendable`](/documentation/Swift/Sendable) [`Encodable`](/documentation/Swift/Encodable) [`Equatable`](/documentation/Swift/Equatable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)