# Gatling Recorder - Recorder execution failed

**URL:** <https://community.gatling.io/t/gatling-recorder-recorder-execution-failed/9470>\
**Category:** Gatling (Open-Source)\
**Created:** [December 20, 2024, 10:21am UTC](https://community.gatling.io/t/gatling-recorder-recorder-execution-failed/9470 "2024-12-20T10:21:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![glg101](https://avatars.discourse-cdn.com/v4/letter/g/f14d63/32.png) [@glg101](https://community.gatling.io/u/glg101)\
**Post date:** [December 20, 2024, 10:21am UTC](https://community.gatling.io/t/gatling-recorder-recorder-execution-failed/9470/1 "2024-12-20T10:21:52Z")

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**Gatling version** : 3.13.1  
**Gatling flavor** : java  
**Gatling build tool** : maven  
**Maven Version** : Apache Maven 3.9.9  
**Java Version** : jdk 11.0.25 (Adoptium OpenJDK Windows x64)  
**OS** : Windows 11

I have just downloaded the latest version of Gatling Open-Source SDK Java version from:  
[Download | Gatling](https://gatling.io/products/download) →   
gatling-maven-plugin-demo-java-main.zip

I am able to run the Gatling simulation successfully with the cmd:

> mvnw.cmd gatling:test

However, I am unable to run the Gatling Recorder with the cmd:

> mvnw.cmd gatling:recorder

I keep getting the following exception:

[ERROR] Failed to execute goal io.gatling.gatling-maven-plugin:4:12:1:recorder (default-cli) on project gatling-maven-plugin-demo-java: Recorder execution failed: UnsupportedOperationException  
Caused by: org.apache.maven.plugin.MojoExecutionException: Recorder execution failed  
Caused by: java.lang.UnsupportedOperationException  
at java.util.AbstractList.add (AbstractList.java:153)

Appreciate if someone can help provide a solution for this issue.

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<div class="post-metadata">

**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\
**Post date:** [December 20, 2024, 10:49am UTC](https://community.gatling.io/t/gatling-recorder-recorder-execution-failed/9470/2 "2024-12-20T10:49:38Z")

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That was indeed a regression bug, thanks for reporting!  
It’s now fixed, please upgrade gatling-maven-plugin 4.12.2.

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**Author:** ![glg101](https://avatars.discourse-cdn.com/v4/letter/g/f14d63/32.png) [@glg101](https://community.gatling.io/u/glg101)\
**Post date:** [December 20, 2024, 11:17am UTC](https://community.gatling.io/t/gatling-recorder-recorder-execution-failed/9470/3 "2024-12-20T11:17:31Z")

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Yes! That resolved the issue.  
Thanks for the help.

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**Author:** ![system](https://europe1.discourse-cdn.com/flex013/uploads/gatling2/original/2X/b/b148e0742de35c6280726cabf3ecd3de2d320f63.png) [@system](https://community.gatling.io/u/system)\
**Post date:** [January 19, 2025, 11:18am UTC](https://community.gatling.io/t/gatling-recorder-recorder-execution-failed/9470/4 "2025-01-19T11:18:21Z")

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