<!--
{
  "availability" : [
    "iOS: 18.4.0 -",
    "iPadOS: 18.4.0 -",
    "macCatalyst: 18.4.0 -",
    "macOS: 15.4.0 -",
    "tvOS: 18.4.0 -",
    "visionOS: 2.4.0 -",
    "watchOS: 11.4.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "TabularData",
  "identifier" : "/documentation/TabularData/CSVReadingError/unsupportedColumnType(columnIndex:columnName:type:)",
  "metadataVersion" : "0.1.0",
  "role" : "Case",
  "symbol" : {
    "kind" : "Case",
    "modules" : [
      "TabularData"
    ],
    "preciseIdentifier" : "s:11TabularData15CSVReadingErrorO21unsupportedColumnTypeyACSi_S2StcACmF"
  },
  "title" : "CSVReadingError.unsupportedColumnType(columnIndex:columnName:type:)"
}
-->

# CSVReadingError.unsupportedColumnType(columnIndex:columnName:type:)

An error that indicates that a column type is not one of the types supported by CSV.

```
case unsupportedColumnType(columnIndex: Int, columnName: String, type: String)
```

## Parameters

`columnIndex`

The index of the column with the invalid type.

`columnName`

The name of the column with the invalid type.

`type`

The requested type.

---

Copyright &copy; 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)