---
title: 2017: Operation not supported on this chat's service type | API Docs
description: The chat's service does not support this operation — the message names the service required.
---

This operation is not supported on the chat’s service type. This is an HTTP 409 error. Location requests, for example, only work in iMessage chats — not SMS or RCS. The `message` field names the service the operation requires.

## Troubleshooting

- Check `service` on the chat before calling, and retry on a chat whose service supports the operation
- A chat’s service is decided at send time by what the recipient can receive — see the Protocol Selection guide

## Related

- [Location Sharing](/guides/location-sharing/index.md)
- [Protocol Selection](/guides/messaging/protocol-selection/index.md)
- [Error Codes](/error/index.md)