Best is to be sure to run with an Java JDK instead of an JRE. You can change this under Window > Preferences > Java > Installed JREs: ![Installed JREs][1] The other workaround is to disable the --release option in the Java Compiler Settings of your Project: ![Disable -- release option][2] [1]: https://answers.axonivy.com/upfiles/Screenshot_20200626_135545.png [2]: https://answers.axonivy.com/upfiles/Screenshot_20200626_135224.png

Best is to be sure to run with an JDK instead of an JRE. You can change this under Window > Preferences > Java > Installed JREs: ![Installed JREs][1] The other workaround is to disable the --release option in the Java Compiler Settings of your Project: ![Disable -- release option][2] [1]: https://answers.axonivy.com/upfiles/Screenshot_20200626_135545.png [2]: https://answers.axonivy.com/upfiles/Screenshot_20200626_135224.png