---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/40140#article
headline: "40140: Failed to issue Dequeue instruction due to missing 'call_sid' property"
url: https://www.twilio.com/docs/api/errors/40140
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 40140: Failed to issue Dequeue instruction due to missing 'call\_sid' property

Log Type: APPLICATION

Log Level: ERROR

## Description

### Possible causes

* The Task was not created via the `<Enqueue>` verb
* The `call_sid` property is missing in the Task's attributes

### Possible solutions

* Only issue Dequeue instruction on Tasks created via the `<Enqueue>` verb
* Ensure that `call_sid` property is present in the Task's attributes