Configuration with Minecraft - enigmatica 2 server crashes when trying launch it

Technical Support
,
1

System Information

Field Value
Operating System Linux - Ubuntu 24.04.2 on x86_64
Product AMP ‘Phobos’ v2.6.0.12 (Mainline)
Virtualization None
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Failed

Problem Description

Issue

im trying to create a enigmatica 2 minecraft server using amp however after installing it as instructed it crashes with this error message:

Error: Could not find or load main class #!.bin.bash

Caused by: java.lang.ClassNotFoundException: #!.bin.bash

Reproduction Steps

  • download enigmatica 2 server zip file from here https://www.curseforge.com/minecraft/modpacks/enigmatica2expert/files/5198828
  • extract it
  • run the enigmatica 2 server using the .bat file provided
  • the server runs successfully
  • create a minecraft server with amp
  • turn the enigmatica 2 server into a zip file
  • upload it to the amp minecraft server
  • extract the zip file
  • set the forge.jar file as startup
  • import the configuration settings
  • copy the contents of the .sh file and paste it into additional java options
  • launch the server on amp and it now crashes
2

The additional Java options are for Java args, you don’t paste the whole start script in there.
You must select the right Forge version in AMP

3

Thanks for the response. The instructions for making a server are a little bit unclear about the fact that you have to make a forge server only including it at the end as an additional step, regardless i did make my amp server using forge version 14.23.5.2860 as required and selected the forge-1.12.2-14.23.5.2860.jar as startup jar. as for the java args i tried launching the server without any and it was crashing with this error message:

A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException

08:44:25

at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:109)

at java.base/java.lang.reflect.Method.invoke(Method.java:580)

at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70)

at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34)

Caused by: java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader ‘bootstrap’)

at net.minecraft.launchwrapper.Launch.(Launch.java:34)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)

… 3 more

4

You need to select java 8 as the Java Version for 1.12.2

5

Thanks Potato king. that seems to have done it. Is there anywhere i can find a full list of the minecraft versions and which ones require what java versions?

6

There’s a cheat sheet here (though I need to overhaul the rest of the FAQ)

7

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