---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/13232#article
headline: "13232: Dial->Conference: Invalid startConferenceOnEnter value"
url: https://www.twilio.com/docs/api/errors/13232
inLanguage: en
dateModified: 2026-06-08T11:29:20.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 13232: Dial->Conference: Invalid startConferenceOnEnter value

Log Level: WARNING

## Description

Twilio returns this warning when the `<Conference>` noun inside `<Dial>` includes a `startConferenceOnEnter` value other than `true` or `false`. Use `startConferenceOnEnter` to control whether a participant starts the conference when joining. If you omit the attribute, the default value is `true`. If you set it to `false` before the conference starts, that participant is muted and hears background music until another participant joins with `startConferenceOnEnter="true"`.

### Possible causes

* The `<Conference>` noun sets `startConferenceOnEnter` to a value other than `true` or `false`.
* A dynamic value in your TwiML or application logic resolves to an unsupported value for `startConferenceOnEnter`. The attribute only accepts `true` or `false`.
* You are trying to implement a moderated conference, but the participant who should start the conference was not assigned a valid `startConferenceOnEnter` value.

### Possible solutions

* Set `startConferenceOnEnter` to `true` or `false` in your `<Conference>` TwiML.
* Remove the `startConferenceOnEnter` attribute if you want to use the default behavior. The default value is `true`.
* If you are building a moderated conference, set `startConferenceOnEnter="true"` for participants who should start the conference and `startConferenceOnEnter="false"` for participants who should wait in the lobby with background music.
* Validate the value before you generate TwiML so your application only sends supported boolean values.

#### Additional resources

* [`<Conference>` TwiML noun](/docs/voice/twiml/conference)
* [`<Dial>` TwiML verb](/docs/voice/twiml/dial)
* [Conferences Participants subresource](/docs/voice/api/conference-participant-resource)