I've been making my own mudpack so I can have all the mods I want. Everything is fine except the Caverns 2 mod. My game crashes when I create a world. I tried it on a mudpack with just that mod installed and it all works fine so I can only assume it's a conflict or something.

 

Here's what the crash log says(short version):

 

Quote

---- Minecraft Crash Report ----

WARNING: coremods are present:
  Plugin (NotEnoughIDs-1.5.4.3.jar)
  LibrarianLib Plugin (librarianlib-1.12.2-4.15.jar)
  CXLibraryCore (cxlibrary-1.12.1-1.6.1.jar)
  CorePlugin (ForgeEndertech-1.12.2-4.4.6.0-build.0244.jar)
  ForgelinPlugin (Forgelin-1.8.2.jar)
  Born in a Barn (Born In A Barn V1.8-1.12-1.1.jar)
  CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
  Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
  ShetiPhian-ASM (ShetiPhian-ASM-1.12.0.jar)
  EnderCorePlugin (EnderCore-1.12.2-0.5.43.jar)
  AstralCore (astralsorcery-1.12.2-1.10.10.jar)
  Do not report to Forge! (If you haven't disabled the FoamFix coremod, try disabling it in the config! Note that this bit of text will still appear.) (foamfix-0.10.3-1.12.2.jar)
  IELoadingPlugin (ImmersiveEngineering-core-0.12-88.jar)
  IvToolkit (IvToolkit-1.3.3-1.12.jar)
  LoadingPlugin (Quark-r1.5-144.jar)
  Wizardry Plugin (wizardry-0.9.9.jar)
  LoadingPlugin (NoNausea-MC1.12-1.0.jar)
  OpenModsCorePlugin (OpenModsLib-1.12.2-0.12.1.jar)
Contact their authors BEFORE contacting forge

// Why is it breaking

Time: 1/13/19 5:34 PM
Description: Exception in server tick loop

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Cavern II (cavern)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: 4
    at java.lang.String.charAt(String.java:646)
    at cavern.block.RandomiteHelper.refreshItems(RandomiteHelper.java:45)
    at cavern.core.Cavern.onServerStarting(Cavern.java:339)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:624)
    at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136)
    at net.minecraftforge.fml.common.Loader.serverStarting(Loader.java:792)
    at net.minecraftforge.fml.common.FMLCommonHandler.handleServerStarting(FMLCommonHandler.java:297)
    at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:158)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
    at java.lang.Thread.run(Thread.java:745)

 

 

I also have an issue where my world spawns with massive craters all over, but that's another issue and probably a mod I haven't pinpointed yet, lol.

Also, I tried submitting a bug report to the mod maker, but there's been no updates since about January last year:(

It works on it's own with no other mods installed. Odd

So If I try removing a few mods that alter that I may find the issue?

I removed Environmental Tech, Immersive engineering and taiga. Fingers crossed that helps. I'd like to keep my other tech mods if I can

That doesn't work either. I guess it just doesn't like anything that adds more ores:( Or I'm not finding that exact entry yet.

Any ideas anyone?

I wish I had the knowledge to do so. I do have a few ideas though:)