---
page_type: error
code: 31941
message: "31941: Stream - Invalid Track configuration"
level: ERROR
product: Programmable Voice
---

## Description

Unsupported value of track attribute in TwiML

### Possible Causes

- Value different of "inbound\_track" is used with verb Connect
- Value different of "inbound\_track", "outbound\_track" or "both\_tracks" is used with verb Start

### Possible Solutions

- Make sure track value is among supported ones