---
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headline: "50510: Invalid message media SID"
url: https://www.twilio.com/docs/api/errors/50510
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 50510: Invalid message media SID

Log Level: ERROR

## Description

An invalid multimedia attachment SID was supplied for this message.

### Possible causes

* MediaSid parameter provided with the request does not match a valid media SID pattern (MExx).

### Possible solutions

* Add a valid MediaSid parameter to the API request and supply a media SID that is uploaded under your service instance.