# AWS Chariot Server - Topic Limit

**URL:** <https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752>\
**Category:** Chariot MQTT Server\
**Created:** [May 30, 2025, 5:08am UTC](https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752 "2025-05-30T05:08:52Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![EricWhite](https://avatars.discourse-cdn.com/v4/letter/e/df788c/32.png) [@EricWhite](https://forum.cirrus-link.com/u/EricWhite)\
**Post date:** [May 30, 2025, 5:08am UTC](https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752/1 "2025-05-30T05:08:52Z")

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Hello.  
When publishing from Ignition with UNS Transmitter, I’m getting the following warning on my Chariot Server. _PUBLISH - topic with 11 levels exceeds max allowed 10 levels_

 ![image](https://canada1.discourse-cdn.com/flex028/uploads/cirrus_link/original/1X/f9f9606db773d0c9e7e37d000fc83c3653c037db.png)

I didn’t think there was a limit on topic levels?

Is there a setting somewhere I need to update?

Cheers, Eric

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**Author:** ![wes.johnson](https://avatars.discourse-cdn.com/v4/letter/w/f14d63/32.png) [@wes.johnson](https://forum.cirrus-link.com/u/wes.johnson)\
**Post date:** [May 30, 2025, 3:17pm UTC](https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752/2 "2025-05-30T15:17:22Z")

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By default, this is 10. It can be changed by modifying the file here:  
`[CHARIOT_INSTALL_DIR]/conf/com.cirruslink.chariot.server.config`

In it, you can specify this limit as:  
`maxTopicLevels=I"25"`

If you modify this file, the Chariot MQTT Server service will restart.

In 2.7.0 (which is about to be released) we have modified this limit to default to 25.

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**Author:** ![EricWhite](https://avatars.discourse-cdn.com/v4/letter/e/df788c/32.png) [@EricWhite](https://forum.cirrus-link.com/u/EricWhite)\
**Post date:** [June 2, 2025, 12:35am UTC](https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752/3 "2025-06-02T00:35:43Z")

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Ahh perfect, thanks Wes, I’ll try that.

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**Author:** ![gnguyen](https://avatars.discourse-cdn.com/v4/letter/g/41988e/32.png) [@gnguyen](https://forum.cirrus-link.com/u/gnguyen)\
**Post date:** [June 10, 2025, 6:06pm UTC](https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752/4 "2025-06-10T18:06:09Z")

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Hi Wes,

There is the release note for 2.7 but no download link… where/when will it be available?

BR,

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**Author:** ![wes.johnson](https://avatars.discourse-cdn.com/v4/letter/w/f14d63/32.png) [@wes.johnson](https://forum.cirrus-link.com/u/wes.johnson)\
**Post date:** [June 10, 2025, 10:22pm UTC](https://forum.cirrus-link.com/t/aws-chariot-server-topic-limit/752/5 "2025-06-10T22:22:36Z")

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There was a small hiccup in the AWS Marketplace deployment. Once that is complete, it will be posted here: [Chariot Downloads - Chariot MQTT Server v2.7 Documentation - Confluence](https://docs.chariot.io/display/CHAR27/Chariot+Downloads). It should be posted within the next day or two.