# 35126: The ScheduleType value provided is not supported for this channel

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when you try to schedule a Programmable Messaging message with a `ScheduleType` value that the selected channel does not accept. For scheduled messages, Twilio accepts only `fixed`, and scheduled messaging is supported for SMS, MMS, RCS, and WhatsApp.

### Possible causes

* You set `ScheduleType` to a value other than `fixed`.
* You tried to schedule a message on a channel that does not support Message Scheduling. Scheduled messaging is supported for SMS, MMS, RCS, and WhatsApp.
* You submitted a scheduling request without `MessagingServiceSid`. To create a scheduled message, include `MessagingServiceSid` with `ScheduleType` and `SendAt`.

### Possible solutions

* Set `ScheduleType` to `fixed`.
* Send the message through a supported channel if you need scheduling. Use SMS, MMS, RCS, or WhatsApp for scheduled sends.
* Include `MessagingServiceSid` and a valid `SendAt` value when you create the message. `SendAt` must be an ISO-8601 timestamp between 15 minutes and 35 days in the future.
* If you are sending on a channel that does not support scheduling, remove the scheduling parameters and send the message immediately.

#### Additional resources

* [Message Scheduling](/docs/messaging/features/message-scheduling)
* [Messages resource](/docs/messaging/api/message-resource)
* [Get started with Messaging Services](/docs/messaging/tutorials/send-messages-with-messaging-services)