# while executing script Getting exception error this version of the Java Runtime only recognizes class file versions up to 65.0 **URL:** \ **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:** 1\ **Showing post:** 2
**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")
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,… --- _[View the full topic](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)._