---
title: Error constants
framework: pushtotalk
role: collectionGroup
role_heading: API Collection
path: pushtotalk/ptchannelerror-error-constants
---

# Error constants

Error codes for channel operations.

## Topics

### Constants

- [unknown](pushtotalk/ptchannelerror-swift.struct/unknown.md)
- [appNotForeground](pushtotalk/ptchannelerror-swift.struct/appnotforeground.md)
- [channelNotFound](pushtotalk/ptchannelerror-swift.struct/channelnotfound.md)
- [channelLimitReached](pushtotalk/ptchannelerror-swift.struct/channellimitreached.md)
- [callActive](pushtotalk/ptchannelerror-swift.struct/callactive.md)
- [transmissionInProgress](pushtotalk/ptchannelerror-swift.struct/transmissioninprogress.md)
- [transmissionNotFound](pushtotalk/ptchannelerror-swift.struct/transmissionnotfound.md)
- [deviceManagementRestriction](pushtotalk/ptchannelerror-swift.struct/devicemanagementrestriction.md)
- [screenTimeRestriction](pushtotalk/ptchannelerror-swift.struct/screentimerestriction.md)
- [transmissionNotAllowed](pushtotalk/ptchannelerror-swift.struct/transmissionnotallowed.md)

## See Also

### Inspecting a channel error

- [PTChannelError.Code](pushtotalk/ptchannelerror-swift.struct/code.md)