---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/32504#article
headline: "32504: Voice Conversation: Incomplete Conversation."
url: https://www.twilio.com/docs/api/errors/32504
inLanguage: en
dateModified: 2026-04-29T19:18:40.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 32504: Voice Conversation: Incomplete Conversation.

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when an existing voice conversation does not include a Frontline worker participant. Review the conversation and make sure the assigned worker is present before you continue the Frontline voice flow.

### Possible causes

* Your Frontline routing configuration did not assign a worker to the conversation.
* The conversation was created directly with the Conversations API instead of through Frontline, so the conversation does not match the structure Frontline expects for voice handling.
* The conversation was created by a Frontline worker or admin, but the worker participant was not added successfully.

### Possible solutions

* Review your Frontline routing configuration and confirm that it assigns a worker to the conversation.
* Fetch the conversation and inspect its participants to verify that the expected Frontline worker participant exists.
* If the conversation was created outside Frontline or is missing the required worker participant, delete the incomplete conversation and create a new conversation through your Frontline flow.

#### Additional resources

* [Conversation Resource](/docs/conversations/api/conversation-resource)
* [Conversation Participant Resource](/docs/conversations/api/conversation-participant-resource)
* [Modifying a Conversation, Message, or Participant](/docs/conversations/modifying-objects)