# 31210: Call Message Event Type is invalid.

Log Type: APPLICATION

Log Level: ERROR

## Description

The Message Type used for sending Call Message Event is invalid. Please see Twilio's [Voice SDK Call Message Events Documentation](/docs/voice/sdks/call-message-events/) for more information on valid Message Type.

### Possible causes

The Message Type used for sending Call Message Event is invalid.

### Possible solutions

* Verify that Message Type being sent with Call Message Event is a value supported by Twilio Programmable Voice
* Use one of the [supported Message Types](/docs/voice/sdks/call-message-events/) to call a Twilio function.