Minecraft GTNH Server Failing To Launch After Initial Creation

Technical Support
, ,
1

OS Name/Version: Ubuntu Server 26.04

Product Name/Version: AMP Version 2.8.0.4 - 20260724.1

Problem Description: I am attempting to create a GregTech New Horizons server for my friends and I and I cannot get the server to launch. Every time I launch I get the error that “The Minecraft server stopped within 5 seconds of starting, this is not a fault with AMP - you should check your Minecraft servers log files to find out why it is unable to start.” I am unsure what the issue exactly is and have been troubleshooting with no success. Below is the server log on my last attempt to run it (I could not post the entire thing but I belive this is the section with the reason for the failure). Any help appreciated!

[20:50:46] [main/DEBUG] [FML/]: Injecting tracing printstreams for STDOUT/STDERR.
[20:50:46] [main/INFO] [FML/]: Forge Mod Loader version 7.99.40.1614 for Minecraft 1.7.10 loading
[20:50:46] [main/INFO] [FML/]: Java is OpenJDK 64-Bit Server VM, version 17.0.20.1, running on Linux:amd64:7.0.0-30-generic, installed at /usr/lib/jvm/temurin-17-jdk-amd64
[20:50:46] [main/DEBUG] [FML/]: Java classpath at launch is lwjgl3ify-forgePatches.jar
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/INFO] [LaunchWrapper/]: Constructing tweaker me.eigenraven.lwjgl3ify.relauncher.Lwjgl3ifyRelauncherTweaker
[20:50:48] [main/INFO] [FML/]: Lwjgl3ify reparseable status: true (name: lwjgl3ify-2.1.16.jar)
[20:50:48] [main/INFO] [FML/]: Removed lwjgl3ify from the list of non-mod coremods
[20:50:48] [main/DEBUG] [FML/]: Instantiating coremod class Lwjgl3ifyCoremod
[20:50:48] [main/DEBUG] [FML/]: The coremod me.eigenraven.lwjgl3ify.core.Lwjgl3ifyCoremod requested minecraft version 1.7.10 and minecraft is 1.7.10. It will be loaded.
[20:50:48] [main/DEBUG] [FML/]: Enqueued coremod Lwjgl3ifyCoremod
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/WARN] [LaunchWrapper/]: Duplicate tweaker class org.spongepowered.asm.launch.MixinTweaker
[20:50:48] [main/INFO] [LaunchWrapper/]: Constructing tweaker cpw.mods.fml.common.launcher.FMLDeobfTweaker
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:50:48] [main/DEBUG] [FML/]: Injecting coremod ThaumcraftDepLoaderNuker {baubles.nuker.ThaumcraftDepLoaderNuker} class transformers
[20:50:48] [main/DEBUG] [FML/]: Injection complete
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin for ThaumcraftDepLoaderNuker {baubles.nuker.ThaumcraftDepLoaderNuker}
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin ThaumcraftDepLoaderNuker
[20:50:48] [main/DEBUG] [FML/]: [ThaumcraftDepLoaderNuker] Redirected thaumcraft.codechicken.core.launch.DepLoader FMLPluginWrapper to call our FMLPlugin baubles.nuker.ThaumcraftDepLoaderNuker instead
[20:50:48] [main/DEBUG] [FML/]: Coremod plugin class ThaumcraftDepLoaderNuker run successfully
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:50:48] [main/DEBUG] [FML/]: Injecting coremod FMLCorePlugin {cpw.mods.fml.relauncher.FMLCorePlugin} class transformers
[20:50:48] [main/TRACE] [FML/]: Registering transformer cpw.mods.fml.common.asm.transformers.MarkerTransformer
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer cpw.mods.fml.common.asm.transformers.MarkerTransformer
[20:50:48] [main/TRACE] [FML/]: Registering transformer cpw.mods.fml.common.asm.transformers.SideTransformer
[20:50:48] [main/INFO] [coretweaks/]: Replacing cpw.mods.fml.common.asm.transformers.SideTransformer with 2 wrappers: [CachedTransformerWrapper, PatternConditionalTransformerWrapper]
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer cpw.mods.fml.common.asm.transformers.SideTransformer
[20:50:48] [main/TRACE] [FML/]: Registering transformer cpw.mods.fml.common.asm.transformers.EventSubscriptionTransformer
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer cpw.mods.fml.common.asm.transformers.EventSubscriptionTransformer
[20:50:48] [main/DEBUG] [FML/]: Injection complete
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin for FMLCorePlugin {cpw.mods.fml.relauncher.FMLCorePlugin}
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin FMLCorePlugin
[20:50:48] [main/DEBUG] [FML/]: Read 527 binary patches
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Transformer error
java.lang.ClassNotFoundException: Exception caught while transforming class net.minecraft.client.ClientBrandRetriever
	at System//net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:297) [LaunchClassLoader.class:?]
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:592) [?:?]
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525) [?:?]
	at java.base/java.lang.Class.forName0(Native Method) ~[?:?]
	at java.base/java.lang.Class.forName(Class.java:469) [?:?]
	at Launch//cpw.mods.fml.common.asm.FMLSanityChecker.call(FMLSanityChecker.java:90) [FMLSanityChecker.class:?]
	at Launch//cpw.mods.fml.common.asm.FMLSanityChecker.call(FMLSanityChecker.java:39) [FMLSanityChecker.class:?]
	at System//cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:133) [forge-1.7.10-10.13.4.1614-1.7.10-universal.jar:?]
	at System//net.minecraft.launchwrapper.Launch.rfb$realLaunch(Launch.java:235) [Launch.class:?]
	at System//net.minecraft.launchwrapper.Launch.launch(Launch.java:35) [Launch.class:?]
	at System//net.minecraft.launchwrapper.Launch.main(Launch.java:60) [Launch.class:?]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.base/java.lang.reflect.Method.invoke(Method.java:569) ~[?:?]
	at com.gtnewhorizons.retrofuturabootstrap.Main.main(Main.java:207) [lwjgl3ify-forgePatches.jar:?]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.base/java.lang.reflect.Method.invoke(Method.java:569) ~[?:?]
	at System//me.eigenraven.lwjgl3ify.rfb.entry.ServerMain.run(ServerMain.java:37) [lwjgl3ify-forgePatches.jar:?]
	at System//me.eigenraven.lwjgl3ify.rfb.entry.ServerMain.main(ServerMain.java:12) [lwjgl3ify-forgePatches.jar:?]
Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/ClientBrandRetriever for invalid side SERVER
	at Launch//cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50) ~[forge-1.7.10-10.13.4.1614-1.7.10-universal.jar:?]
	at Launch//makamys.coretweaks.optimization.transformerproxy.TransformerProxy.invokeNextHandler(TransformerProxy.java:44) ~[coretweaks-0.3.3.6-GTNH.jar:?]
	at Launch//makamys.coretweaks.optimization.ForgeFastWildcardTransformers$PatternConditionalTransformerWrapper.wrapTransform(ForgeFastWildcardTransformers.java:53) ~[coretweaks-0.3.3.6-GTNH.jar:?]
	at Launch//makamys.coretweaks.optimization.transformerproxy.TransformerProxy.invokeNextHandler(TransformerProxy.java:46) ~[coretweaks-0.3.3.6-GTNH.jar:?]
	at Launch//makamys.coretweaks.optimization.transformercache.lite.CachedTransformerWrapper.wrapTransform(CachedTransformerWrapper.java:24) ~[coretweaks-0.3.3.6-GTNH.jar:?]
	at Launch//makamys.coretweaks.optimization.transformerproxy.TransformerProxy.invokeNextHandler(TransformerProxy.java:46) ~[coretweaks-0.3.3.6-GTNH.jar:?]
	at Launch//makamys.coretweaks.optimization.transformerproxy.TransformerProxy.transform(TransformerProxy.java:27) ~[coretweaks-0.3.3.6-GTNH.jar:?]
	at System//net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:408) ~[LaunchClassLoader.class:?]
	at System//net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:295) ~[LaunchClassLoader.class:?]
	... 21 more
[20:50:48] [main/ERROR] [FML/]: FML appears to be missing any signature data. This is not a good thing
[20:50:48] [main/DEBUG] [FML/]: Coremod plugin class FMLCorePlugin run successfully
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:50:48] [main/DEBUG] [FML/]: Injecting coremod FMLForgePlugin {net.minecraftforge.classloading.FMLForgePlugin} class transformers
[20:50:48] [main/TRACE] [FML/]: Registering transformer net.minecraftforge.classloading.FluidIdTransformer
[20:50:48] [main/INFO] [coretweaks/]: Replacing net.minecraftforge.classloading.FluidIdTransformer with 2 wrappers: [CachedTransformerWrapper, PatternConditionalTransformerWrapper]
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer net.minecraftforge.classloading.FluidIdTransformer
[20:50:48] [main/DEBUG] [FML/]: Injection complete
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin for FMLForgePlugin {net.minecraftforge.classloading.FMLForgePlugin}
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin FMLForgePlugin
[20:50:48] [main/DEBUG] [FML/]: Coremod plugin class FMLForgePlugin run successfully
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:50:48] [main/DEBUG] [FML/]: Injecting coremod FluidCraftCore {com.glodblock.github.coremod.FluidCraftCore} class transformers
[20:50:48] [main/TRACE] [FML/]: Registering transformer com.glodblock.github.coremod.FCClassTransformer
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer com.glodblock.github.coremod.FCClassTransformer
[20:50:48] [main/DEBUG] [FML/]: Injection complete
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin for FluidCraftCore {com.glodblock.github.coremod.FluidCraftCore}
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin FluidCraftCore
[20:50:48] [main/DEBUG] [FML/]: Coremod plugin class FluidCraftCore run successfully
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:50:48] [main/DEBUG] [FML/]: Injecting coremod AppEngCore {appeng.transformer.AppEngCore} class transformers
[20:50:48] [main/TRACE] [FML/]: Registering transformer appeng.transformer.asm.ASMIntegration
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer appeng.transformer.asm.ASMIntegration
[20:50:48] [main/TRACE] [FML/]: Registering transformer appeng.transformer.asm.ApiRepairer
[20:50:48] [main/INFO] [AE2-ApiRepairer/]: AE2 ApiFixer Installed
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer appeng.transformer.asm.ApiRepairer
[20:50:48] [main/DEBUG] [FML/]: Injection complete
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin for AppEngCore {appeng.transformer.AppEngCore}
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin AppEngCore
[20:50:48] [main/DEBUG] [FML/]: Coremod plugin class AppEngCore run successfully
[20:50:48] [main/INFO] [LaunchWrapper/]: Installing tweaker cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[20:50:48] [main/DEBUG] [FML/]: Injecting coremod CodeChickenCorePlugin {codechicken.core.launch.CodeChickenCorePlugin} class transformers
[20:50:48] [main/TRACE] [FML/]: Registering transformer codechicken.lib.asm.ClassHeirachyManager
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer codechicken.lib.asm.ClassHeirachyManager
[20:50:48] [main/TRACE] [FML/]: Registering transformer codechicken.lib.asm.RedirectorTransformer
[20:50:48] [main/DEBUG] [LaunchWrapper/]: Registered class transformer codechicken.lib.asm.RedirectorTransformer
[20:50:48] [main/DEBUG] [FML/]: Injection complete
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin for CodeChickenCorePlugin {codechicken.core.launch.CodeChickenCorePlugin}
[20:50:48] [main/DEBUG] [FML/]: Running coremod plugin CodeChickenCorePlugin
[20:50:48] [main/ERROR] [CodeChickenCore/]: You should have at least 3.0 GB of RAM but you have only allocated 2.8 GB.
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: java.lang.reflect.InvocationTargetException
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at System//me.eigenraven.lwjgl3ify.rfb.entry.ServerMain.run(ServerMain.java:37)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at System//me.eigenraven.lwjgl3ify.rfb.entry.ServerMain.main(ServerMain.java:12)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: Caused by: java.lang.ExceptionInInitializerError
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at Launch//codechicken.core.launch.CodeChickenCorePlugin.systemCheck(CodeChickenCorePlugin.java:222)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at Launch//codechicken.core.launch.CodeChickenCorePlugin.injectData(CodeChickenCorePlugin.java:92)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at System//cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:119)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at System//net.minecraft.launchwrapper.Launch.rfb$realLaunch(Launch.java:235)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at System//net.minecraft.launchwrapper.Launch.launch(Launch.java:35)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at System//net.minecraft.launchwrapper.Launch.main(Launch.java:60)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at com.gtnewhorizons.retrofuturabootstrap.Main.main(Main.java:207)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	... 6 more
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: Caused by: java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because "cpw.mods.fml.common.Loader.mccversion" is null
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at Launch//cpw.mods.fml.common.Loader.<init>(Loader.java:198)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at Launch//cpw.mods.fml.common.Loader.instance(Loader.java:176)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at Launch//cpw.mods.fml.common.FMLCommonHandler.<init>(FMLCommonHandler.java:87)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	at Launch//cpw.mods.fml.common.FMLCommonHandler.<clinit>(FMLCommonHandler.java:77)
[20:50:48] [main/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:763]: 	... 17 more

Steps to reproduce:

  • Step 1 - Create AMP instance

  • Step 2 - Download GregTech Java 17-25 Server Pack (modpack version 2.8.4, Minecraft version 1.7.10) from their official website

  • Step 3 - Import into AMP instance

  • Step 4 - Configure instance settings

    • Java and Memory
      • Memory Limit -10240MB
      • Memory pre-allocation - 6144MB
      • Java Version - TEMURIN 17 (jdk)
    • Server and Startup
      • Server Type - Custom
      • Custom Startup Arguments - -Dfml.readTimeout=180 -Dfml.queryResult=confirm @java9args.txt -jar {JarFile} nogui -Djava.system.class.loader=com.gtnewhorizons.retrofuturabootstrap.RfbSystemClassLoader
      • Server JAR - lwjgl3ify-forgePatches.jar
    • Everything else left default

  • Actions taken to resolve so far:

So far I’ve tried different Java Versions (versions 17 and 25) and trying without the custom start up arguments. Both had the same result, the server still did not launch.