risingfish

Well, I answered my own problem. Java 1.9 is too soon. I switch back to java 8 and it fired right up. Sorry to bother everyone here...

I went through the install steps and the cam seemed to install fine. Unfortunately when I try to run the server, I get the following stack trace: me@homestor:/minecraft2$ sudo java -jar forge-1.12.2-14.23.2.2615-universal.jar A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:564) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:62) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:31) Caused by: java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) ... 6 more I'm running java 1.9 (to soon?) java version "9.0.4" Java(TM) SE Runtime Environment (build 9.0.4+11) Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode) And it's running on Ubuntu Server 16.04. I've been running 1.11.2 fine up until now. Did I miss something? I've attached the log file as well. Thanks! forge-1.12.2-14.23.2.2615-installer.jar.log