---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/13237#article
headline: "13237: Dial->Conference: Invalid Conference Name"
url: https://www.twilio.com/docs/api/errors/13237
inLanguage: en
dateModified: 2026-06-08T11:38:30.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 13237: Dial->Conference: Invalid Conference Name

Log Level: WARNING

## Description

Twilio returns this warning when the conference name passed to `<Dial><Conference>` is not valid. The conference room name must contain between 1 and 128 characters.

### Possible causes

* The `<Conference>` noun does not include a conference name.
* The conference name is an empty string.
* The conference name is longer than 128 characters.

### Possible solutions

* Provide a conference name inside `<Dial><Conference>`.
* Keep the conference name between 1 and 128 characters.
* Validate the conference name in your application before you return TwiML.
* Use a conference name that does not include personal or sensitive data.

#### Additional resources

* [TwiML Voice: `<Conference>`](/docs/voice/twiml/conference)
* [TwiML Voice: `<Dial>`](/docs/voice/twiml/dial)
* [Conferences resource](/docs/voice/api/conference-resource)