---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/50529#article
headline: "50529: Content variables are too long"
url: https://www.twilio.com/docs/api/errors/50529
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 50529: Content variables are too long

Log Type: TWILIO

Log Level: ERROR

## Description

Allowed total length for message content variables is sum of key, value and JSON-specific characters' lengths.

### Possible causes

Either too many variables are defined (max 100 in total), or too long keys (max 16 characters per variable), or too long values (max 256 characters per variable).

### Possible solutions

Follow the length limitations:

* variables: 100 in total;
* key: 16 characters per variable;
* value: 256 characters per variable.