---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/13329#article
headline: "13329: Gather: Invalid partialResultCallbackMethod value"
url: https://www.twilio.com/docs/api/errors/13329
inLanguage: en
dateModified: 2026-03-20T20:33:25.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 13329: Gather: Invalid partialResultCallbackMethod value

Log Level: WARNING

## Description

This warning appears when `<Gather>` receives a `partialResultCallbackMethod` value that is not `GET` or `POST`. The `partialResultCallbackMethod` attribute controls which HTTP verb Twilio uses to request the `partialResultCallback` URL, and its default value is `POST`.

### Possible causes

* The `partialResultCallbackMethod` attribute was set to a value other than `GET` or `POST`.
* The request used a misspelled, unsupported, or otherwise invalid HTTP method value for `partialResultCallbackMethod`.

### Possible solutions

* Set `partialResultCallbackMethod` to `GET` or `POST`.
* If you do not need a custom method, omit `partialResultCallbackMethod` so Twilio uses the default `POST` value.

#### Additional resources

* [Error and Warning Dictionary](/docs/api/errors)
* [TwiML Voice `<Gather>`](/docs/voice/twiml/gather)