MEGAN7-17.sh - java.lang.UnsupportedOperationException: Setting a system-wide Policy object is not supported

Bug Reports
1

Dear MEGAN7 (Prof. Huson and Anupam),
I tried to install megan7 ver17 in linux server and wsl (file MEGAN_Community_unix_7_0_17-beta.sh) but I encounter the error below:

 sh MEGAN_Community_unix_7_0_17-beta.sh
Unpacking JRE ...
Starting Installer ...
An error occurred:
java.lang.UnsupportedOperationException: Setting a system-wide Policy object is not supported
Error log: /tmp/install4jError11327430450876168899.log
java.lang.UnsupportedOperationException: Setting a system-wide Policy object is not supported
        at java.base/java.security.Policy.setPolicy(Policy.java:114)
        at com.install4j.runtime.installer.frontend.headless.AbstractHeadlessScreenExecutor.init(AbstractHeadlessScreenExecutor.java:68)
        at com.install4j.runtime.installer.frontend.headless.ConsoleScreenExecutor.<init>(ConsoleScreenExecutor.java:25)
        at com.install4j.runtime.installer.frontend.headless.InstallerConsoleScreenExecutor.<init>(InstallerConsoleScreenExecutor.java:6)
        at com.install4j.runtime.installer.Installer.getScreenExecutor(Installer.java:98)
        at com.install4j.runtime.installer.Installer.runInProcess(Installer.java:74)
        at com.install4j.runtime.installer.Installer.main(Installer.java:50)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:565)
        at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:84)
        at com.install4j.runtime.launcher.UnixLauncher.start(UnixLauncher.java:71)
        at install4j.Installer2486696690.main(Unknown Source)

Previously, I was able to install ver12 without any problem. Here is the java version

openjdk 11.0.18 2023-01-17
OpenJDK Runtime Environment Temurin-11.0.18+10 (build 11.0.18+10)
OpenJDK 64-Bit Server VM Temurin-11.0.18+10 (build 11.0.18+10, mixed mode)

I hope to hear from you soon,
Thank you,
Best regard,

Lenny

2

Dear Lenny,

Thank you for the information.

This issue actually started after a Java version update—there seem to be some problems with the latest Java release, and we’re currently working on identifying and resolving them.

In the meantime, if you’d like to use the latest features, I recommend working with Java version 7_0_11, which appears to be stable for now.

Best regards,
Anupam