# while executing script Getting exception error this version of the Java Runtime only recognizes class file versions up to 65.0

**URL:** <https://forum.katalon.com/t/while-executing-script-getting-exception-error-this-version-of-the-java-runtime-only-recognizes-class-file-versions-up-to-65-0/195066>\
**Category:** Desktop Testing\
**Tags:** katalon-studio\
**Created:** [November 4, 2026, 7:24am UTC](https://forum.katalon.com/t/while-executing-script-getting-exception-error-this-version-of-the-java-runtime-only-recognizes-class-file-versions-up-to-65-0/195066 "2026-11-04T07:24:12Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![nirmalvenkatraman.v](https://avatars.discourse-cdn.com/v4/letter/n/f6c823/32.png) [@nirmalvenkatraman.v](https://forum.katalon.com/u/nirmalvenkatraman.v)\
**Post date:** [November 4, 2026, 7:24am UTC](https://forum.katalon.com/t/while-executing-script-getting-exception-error-this-version-of-the-java-runtime-only-recognizes-class-file-versions-up-to-65-0/195066/1 "2026-11-04T07:24:12Z")

</div>

Hi Team, Good morning,

While executing the script, I encountered an error. As part of the troubleshooting, I have already upgraded the Java version to **Java 17**. However, the issue still persists. Could you please help review the error and suggest the next steps for resolution?

 ![image](https://europe1.discourse-cdn.com/katalon/original/3X/7/7/777aca4fb761f44481025fa0076cae38699d5aa1.png)

 ![image](https://europe1.discourse-cdn.com/katalon/original/3X/4/1/4190c25d59968721f1a06a0eb5bdff8a947d1083.png)

---

<div class="post-metadata">

**Author:** ![nghi.phan](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/nghi.phan/32/30970_2.png) [@nghi.phan](https://forum.katalon.com/u/nghi.phan)\
**Post date:** [November 4, 2026, 8:38am UTC](https://forum.katalon.com/t/while-executing-script-getting-exception-error-this-version-of-the-java-runtime-only-recognizes-class-file-versions-up-to-65-0/195066/2 "2026-11-04T08:38:45Z")

</div>

I have some help on the other threads, please kindly take a look see if that helps.

> [@I am Getting this exception error this version of the Java Runtime only recognizes class file versions up to 65.0](https://forum.katalon.com/t/i-am-getting-this-exception-error-this-version-of-the-java-runtime-only-recognizes-class-file-versions-up-to-65-0/195065/2):
>
> 1. Java compatibility mismatch (first screenshot) geh/data/ViewException was compiled for Java 25 (class file version 69.0), but the runtime executing Katalon supports up to Java 21 (65.0). That run is therefore not using Java 17. • Ask the owner of the JAR containing geh.data.ViewException to rebuild it for the supported execution runtime—e.g. Java 21 with --release 21 if it uses no newer APIs—and replace the incompatible JAR in the project. • Check Java from inside the running Katalon test,…