---
title: CXErrorCodeRequestTransactionError.Code.unknownCallProvider
framework: callkit
role: symbol
role_heading: Case
path: callkit/cxerrorcoderequesttransactionerror-swift.struct/code/unknowncallprovider
---

# CXErrorCodeRequestTransactionError.Code.unknownCallProvider

The controller couldn’t find a call provider to perform the actions in the requested transaction.

## Declaration

```swift
case unknownCallProvider
```

## See Also

### Constants

- [CXErrorCodeRequestTransactionError.Code.unknown](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/unknown.md)
- [CXErrorCodeRequestTransactionError.Code.unentitled](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/unentitled.md)
- [CXErrorCodeRequestTransactionError.Code.emptyTransaction](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/emptytransaction.md)
- [CXErrorCodeRequestTransactionError.Code.unknownCallUUID](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/unknowncalluuid.md)
- [CXErrorCodeRequestTransactionError.Code.callUUIDAlreadyExists](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/calluuidalreadyexists.md)
- [CXErrorCodeRequestTransactionError.Code.invalidAction](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/invalidaction.md)
- [CXErrorCodeRequestTransactionError.Code.maximumCallGroupsReached](callkit/cxerrorcoderequesttransactionerror-swift.struct/code/maximumcallgroupsreached.md)