---
title: "PipelineDataError.unrecognizedCategory(operation:category:)"
framework: createmlcomponents
role: symbol
role_heading: Case
path: "createmlcomponents/pipelinedataerror/unrecognizedcategory(operation:category:)"
---

# PipelineDataError.unrecognizedCategory(operation:category:)

An error that indicates that a new category was encountered after fitting.

## Declaration

```swift
case unrecognizedCategory(operation: String, category: String)
```

## See Also

### Analyzing the error

- [PipelineDataError.emptyInput(operation:)](createmlcomponents/pipelinedataerror/emptyinput(operation:).md)
- [PipelineDataError.incompatibleConfiguration(operation:debugDescription:)](createmlcomponents/pipelinedataerror/incompatibleconfiguration(operation:debugdescription:).md)
- [PipelineDataError.incompatibleDataFormat(operation:debugDescription:)](createmlcomponents/pipelinedataerror/incompatibledataformat(operation:debugdescription:).md)
- [PipelineDataError.incompatibleShape(_:debugDescription:)](createmlcomponents/pipelinedataerror/incompatibleshape(_:debugdescription:).md)
- [PipelineDataError.missingAnnotation(operation:)](createmlcomponents/pipelinedataerror/missingannotation(operation:).md)
- [PipelineDataError.missingValue(operation:)](createmlcomponents/pipelinedataerror/missingvalue(operation:).md)