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By LinuxShetter · Posted
Hello, i've tried to make a minecraft server for my friends on old laptop. But im getting this error ---- Minecraft Crash Report ---- WARNING: coremods are present: DCLoadingPlugin (DummyCoreUnofficial-2.4.112.3.jar) HCASM (HammerLib-1.12.2-2.0.6.23.jar) Contact their authors BEFORE contacting forge // I feel sad now :( Time: 19.06.25 22:26 Description: Exception in server tick loop java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft at nukeduck.armorchroma.ArmorChroma.<clinit>(ArmorChroma.java:23) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:539) 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:498) 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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) at com.google.common.eventbus.EventBus.post(EventBus.java:217) at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219) at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) at com.google.common.eventbus.Subscriber$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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) at com.google.common.eventbus.EventBus.post(EventBus.java:217) at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136) at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:595) at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98) at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333) at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486) at java.lang.Thread.run(Thread.java:750) Caused by: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ... 35 more Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@57fae983 from coremod FMLCorePlugin at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260) at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ... 37 more Caused by: java.lang.RuntimeException: Attempted to load class bib for invalid side SERVER at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:62) at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256) ... 39 more A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.12.2 Operating System: Linux (amd64) version 6.8.0-51-generic Java Version: 1.8.0_452, Private Build Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Private Build Memory: 1088926088 bytes (1038 MB) / 1634205696 bytes (1558 MB) up to 4194304000 bytes (4000 MB) JVM Flags: 2 total; -Xms1024M -Xmx4500M IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: MCP 9.42 Powered by Forge 14.23.5.2859 44 mods loaded, 44 mods active States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored | State | ID | Version | Source | Signature | |:----- |:------------------------ |:------------------ |:--------------------------------------------- |:---------------------------------------- | | LC | minecraft | 1.12.2 | minecraft.jar | None | | LC | mcp | 9.42 | minecraft.jar | None | | LC | FML | 8.0.99.99 | forge-1.12.2-14.23.5.2859.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 | | LC | forge | 14.23.5.2859 | forge-1.12.2-14.23.5.2859.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 | | LC | codechickenlib | 3.2.3.358 | CodeChickenLib-1.12.2-3.2.3.358-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 | | LC | ancientwarfare | 1.12.2-2.7.0.1032 | ancientwarfare-1.12.2-2.7.0.1032.jar | None | | LC | ancientwarfareautomation | 1.12.2-2.7.0.1032 | ancientwarfare-1.12.2-2.7.0.1032.jar | None | | LC | ancientwarfarenpc | 1.12.2-2.7.0.1032 | ancientwarfare-1.12.2-2.7.0.1032.jar | None | | LC | ancientwarfarestructure | 1.12.2-2.7.0.1032 | ancientwarfare-1.12.2-2.7.0.1032.jar | None | | LC | ancientwarfarevehicle | 1.12.2-2.7.0.1032 | ancientwarfare-1.12.2-2.7.0.1032.jar | None | | L | armorchroma | 1.4-beta | armorchroma-1.12.2-1.4.jar | None | | L | baubles | 1.5.2 | Baubles-1.12-1.5.2.jar | None | | L | betterburning | 0.9.2 | BetterBurning-1.12.2-0.9.2.jar | None | | L | bettercaves | 1.12.2 | bettercaves-1.12.2-2.0.4.jar | None | | L | betterinvisibility | 1.0.1 | betterinvisibility-1.0.1.jar | None | | L | bettermineshafts | 1.12.2-2.2 | BetterMineshaftsForge-1.12.2-2.2.jar | None | | L | bookshelf | 2.3.590 | Bookshelf-1.12.2-2.3.590.jar | None | | L | collective | 2.11 | collective-1.12.2-2.11.jar | None | | L | extendedrenderer | v1.0 | coroutil-1.12.1-1.2.37.jar | None | | L | coroutil | 1.12.1-1.2.37 | coroutil-1.12.1-1.2.37.jar | None | | L | configmod | v1.0 | coroutil-1.12.1-1.2.37.jar | None | | L | dummycore | 2.4.112.3. | DummyCoreUnofficial-2.4.112.3.jar | None | | L | dynamictrees | 1.12.2-0.9.22 | DynamicTrees-1.12.2-0.9.22.jar | None | | L | thaumcraft | 6.1.BETA26 | Thaumcraft_1.12.2_6.1.BETA26.jar | None | | L | dynamictreestc | 1.12.2-1.4.2 | DynamicTreesTC-1.12.2-1.4.2.jar | None | | L | hammercore | 2.0.6.23 | HammerLib-1.12.2-2.0.6.23.jar | None | | L | waila | 1.8.26 | Hwyla-1.8.26-B41_1.12.2.jar | None | | L | jei | 4.16.1.302 | jei_1.12.2-4.16.1.302.jar | None | | L | keepinginventory | 2.4 | KeepingInventory-1.12.2-2.4.jar | None | | L | libraryex | 1.2.1 | LibraryEx-1.12.2-1.2.1.jar | None | | L | netherex | 2.2.4 | NetherEx-1.12.2-2.2.4.jar | None | | L | recipehandler | 0.13 | NoMoreRecipeConflict-0.13(1.12.2).jar | None | | L | nei | 2.4.3 | NotEnoughItems-1.12.2-2.4.3.245-universal.jar | None | | L | thaumadditions | 12.6.6 | ThaumicAdditions-1.12.2-12.6.6.jar | None | | L | thaumicbases | 3.3.500.6r | thaumicbases-3.3.500.6r.jar | None | | L | thaumictinkerer | 1.12.2-5.0-620a0c5 | thaumictinkerer-1.12.2-5.0-620a0c5.jar | None | | L | thaumicwaila | 1.12.2-0.0.2 | ThaumicWaila-1.12.2-0.0.2.jar | None | | L | tumbleweed | 1.12-0.4.7 | tumbleweed-1.12-0.4.7.jar | None | | L | villagespawnpoint | 1.5 | villagespawnpoint_1.12.2-1.5.jar | None | | L | wawla | 2.6.275 | Wawla-1.12.2-2.6.275.jar | None | | L | wooltostring | 1.12.2 | WoolToString-1.12.2-1.0.0.jar | None | | L | zombieawareness | 1.12.1-1.11.16 | zombieawareness-1.12.1-1.11.16.jar | None | | L | betteranimalsplus | 9.0.1 | betteranimalsplus-1.12.2-9.0.1.jar | None | | L | orelib | 3.6.0.1 | OreLib-1.12.2-3.6.0.1.jar | None | Loaded coremods (and transformers): DCLoadingPlugin (DummyCoreUnofficial-2.4.112.3.jar) DummyCore.ASM.DCASMManager HCASM (HammerLib-1.12.2-2.0.6.23.jar) com.zeitheron.hammercore.asm.HammerCoreTransformer Profiler Position: N/A (disabled) Is Modded: Definitely; Server brand changed to 'fml,forge' Type: Dedicated Server (map_server.txt) -
Hey! I noticed you're trying to register your alexandrite item and possibly set its resource location manually with setId(...). I wanted to help clarify a few things that might simplify your code and avoid errors. ✅ The issue: You're using setId(...) inside the item registration like this: public static final RegistryObject<Item> ALEXANDRITE = ITEMS.register("alexandrite", () -> new Item(new Item.Properties().useItemDescriptionPrefix() .setId(ResourceKey.create(Registries.ITEM, ResourceLocation.fromNamespaceAndPath(TutorialMod.MOD_ID, "alexandrite"))))); But: Item.Properties does not have a setId(...) method — this line will either fail or do nothing meaningful. useItemDescriptionPrefix() is mostly used for translation keys (like "item.modid.name") but isn't needed unless you have a very specific reason. 🛠 The fix: You only need to register your item like this: public static final RegistryObject<Item> ALEXANDRITE = ITEMS.register("alexandrite", () -> new Item(new Item.Properties())); Forge automatically handles the ResourceLocation (modid:alexandrite) based on the name passed into .register(...), so there’s no need to manually assign it. 📝 For the texture: Make sure you have this file in your resources: src/main/resources/assets/tutorialmod/models/item/alexandrite.json { "parent": "item/generated", "textures": { "layer0": "tutorialmod:item/alexandrite" } } And your texture PNG goes here: src/main/resources/assets/tutorialmod/textures/item/alexandrite.png 🌍 For the name in-game: Add this to your en_us.json under: src/main/resources/assets/tutorialmod/lang/en_us.json { "item.tutorialmod.alexandrite": "Alexandrite" } Note: if im wrong about the issues you are encountering, i apologize. -
🛠️ Fix for Transparent or Clipping Item Render Issues When Held in First Person (Forge 1.20+) Hey everyone! I recently ran into a frustrating bug while making a custom item (a rocket) for my Forge mod, and I’m sharing the fix because it’s a bit obscure — and it worked wonders. 💥 The Problem: My item rendered semi-transparent and see-through — but only in first person. It also clipped through nearby blocks when held, unlike default items like swords or leads. The texture file was confirmed to be fully opaque (alpha 255), so the issue wasn’t the PNG itself. Interestingly, when no texture was present and the default purple-black checkerboard appeared, the clipping issue disappeared. ✅ The Fix: I ended up resolving it by randomly trying something I found on a Forge forum post about block rendering. I added this property to my item's model JSON — even though it's typically only used for blocks: { "parent": "item/generated", "textures": { "layer0": "farbeyond:item/rocket_item" }, "render_type": "minecraft:cutout" } Boom. That single line forced the item to render using a proper opaque (cutout) layer, removing all the unwanted transparency and clipping behavior in first person. 🙌 Credit: I originally found the "render_type" trick mentioned here, in a block rendering context: 👉 https://forums.minecraftforge.net/topic/149644-1201-help-with-transparent-blocks/ Even though it was meant for blocks, I thought, why not try it on an item? And it worked! Big thanks to the poster — this fix wouldn’t have happened without that tip. Hopefully this helps anyone else stuck on a weird rendering bug like I was. This isn’t a common item solution, so feel free to share it further. I’d love to know if it works for you too.
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By TileEntity · Posted
Use Java 21 instead of Java 24 Also make a test without modernfix -
Ive been on this world for 2 days now, my computer blue screens pretty often so maybe that has something to do with it. maybe just incompatible mods like a lot of people so im hoping someone more knowledgeable can help me find what i need to get rid of. thank you! paste bin
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