---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/32710#article
headline: "32710: Voice User-Defined Message: Subscription Callback Internal Error"
url: https://www.twilio.com/docs/api/errors/32710
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 32710: Voice User-Defined Message: Subscription Callback Internal Error

Log Type: APPLICATION

Log Level: WARNING

## Description

Twilio experienced an unexpected internal error in attempting to deliver an User-Defined Message event to the callback URL provided in the Voice User-Defined Message Subscription request.

### Possible causes

* An error occurred during communication with Twilio internal services.

### Possible solutions

* See the Debugger in the Twilio Console for further information. If you repeatedly receive this error, please contact Twilio Support.