---
title: "CSVReadingError.unsupportedColumnType(columnIndex:columnName:type:)"
framework: Tabular Data
role: symbol
role_heading: Case
platforms: [iOS 18.4+, iPadOS 18.4+, Mac Catalyst 18.4+, macOS 15.4+, tvOS 18.4+, visionOS 2.4+, watchOS 11.4+]
path: "tabulardata/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.

## Declaration

```swift
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.