ContributionsMost RecentMost LikesSolutionsRe: SoapUI 5.6.0 upgrade keeps JRE 8 : java.lang.UnsupportedClassVersionError Hi I fixed it installing the latest jdk available of OpenJDK with the command sudo apt install default-jdk, wich installed jdk 11, this made think the problem was my previous java version (1.8.0_272) Cheers! Re: SoapUI 5.6.0 upgrade keeps JRE 8 : java.lang.UnsupportedClassVersionError richie thanks for the answer I'm running on Ubuntu 20.0.4.1 My java version is: openjdk version "1.8.0_272" OpenJDK Runtime Environment (build 1.8.0_272-8u272-b10-0ubuntu1~20.04-b10) OpenJDK 64-Bit Server VM (build 25.272-b10, mixed mode) I downloaded the SoapUI-x64-5.6.0.sh file from https://www.soapui.org/downloads/thank-you-for-downloading-soapui/ Then i assigned execution permisses and ran it The installation finished without problems but when i wanted to open it the java.lang.UnsupportedClassVersionError shows up I still don't able to find the jre folder. Thanks for your time! Re: SoapUI 5.6.0 upgrade keeps JRE 8 : java.lang.UnsupportedClassVersionError Hi i'm having the same trouble but i cant find the jre subfolder inside of ~/SmartBear/SoapUI-5.6.0/, in wich directory i have to search?