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"Error: java.lang.NoClassDefFoundError:vazkii/arl/item/BasicItem" crash upon launching game

Posted September 12, 20223 yr

Hi, I'm trying to make a modpack for my friends and I keep getting this error when I launch the game.

debug.log: https://pastebin.com/X9YL8dfC

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September 12, 20223 yr

java.lang.ClassNotFoundException: vazkii.arl.item.BasicItem

The error you reported in the title is because you are missing the AutoRegLib mod.

But you also have

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[12Sep2022 14:50:32.463] [Render thread/FATAL] [net.minecraftforge.fml.ModLoader/CORE]: Error during pre-loading phase

net.minecraftforge.fml.ModLoadingException: Mod §eadhooks§r requires §6forgeendertech§r §o9.0.0.0 or above§r

§7Currently, §6forgeendertech§r§7 is §o§nnot installed

at net.minecraftforge.fml.ModLoadingException.lambda$fromEarlyException$0(ModLoadingException.java:50) ~[fmlcore-1.18.2-40.1.68.jar%23119!/:?]

But I think you have a lot of these kinds of errors:

e.g. trying to run a mod for 1.19 with 1.18

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[12Sep2022 14:50:12.608] [main/ERROR] [net.minecraftforge.fml.loading.LanguageLoadingProvider/LOADING]: Missing language javafml version [41,) wanted by NethersDelight-1.19-3.0.jar, found 40

And this large list of missing mods, the reference to "forge" in this list is the mod that wants forge for minecraft 1.19:

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[12Sep2022 14:50:12.614] [main/ERROR] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Missing mandatory dependencies: forgeendertech, yungsapi, yungsapi, terrablender, cucumber, expandability, geckolib3, forgeendertech, codechickenlib, curios, yungsapi, curios, sophisticatedcore, placebo, autoreglib, architectury, feature_nbt_deadlock_be_gone, geckolib3, mantle, supermartijn642configlib, supermartijn642corelib, cyclopscore, patchouli, paucal, insanelib, yungsapi, cyclopscore, balm, forge, patchouli, majruszlib, placebo, cucumber, curios, yungsapi

Boilerplate:

If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com You should also read the support forum sticky post.

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September 13, 20223 yr

Author

to fix the issues will i have to go through the missing mods and download them? i have removed nethers delight for now and have added autoreglib

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September 13, 20223 yr

yes and when you do, check to see if these new mods have other dependencies by looking at their mod page on curseforge.

Mod authors usually list their dependencies in prominent text because they get tired of answering the same questions about why their mod won't work. 🙂

Boilerplate:

If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com You should also read the support forum sticky post.

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By Komagiri · Wednesday at 08:24 PM1 day
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[1.20.1] Custom Effect Help

Currently stuck on making a custom effect for forge 1.20.1
Im trying to add a certain number of hearts to a player once they consume a potion/custom item, i tried doing it with the vanilla effects and it didn't work the way i wanted it to work, so now im trying to make a custom effect that adds this configurable amount of hearts

So far Ive been following KaupanJoes tutorial for both 1.21 and 1.20 and the effect doesn't seem to give any errors nor does its registration, however i cant seem to get it to work with applying it to the item itself

```package com.curseofaros.item; import com.curseofaros.effect.ModEffects; import net.minecraft.world.effect.MobEffectInstance; import net.minecraft.world.effect.MobEffects; import net.minecraft.world.food.FoodProperties; public class ModFoods { public static final FoodProperties FLASK_OF_LIFE = new FoodProperties.Builder()
.fast() .alwaysEat() .nutrition(0) .saturationMod(0)
.effect(() -> new MobEffectInstance(MobEffects.HEAL, 1, 2), 1.0f) .build();

public static final FoodProperties MEDIUM_POTION = new FoodProperties.Builder() .fast() .alwaysEat() .nutrition(0) .saturationMod(0) .effect(() -> new MobEffectInstance(ModEffects.MEDIUM_POTION_EFFECT.get())) .build();

public static final FoodProperties SMALL_POTION = new FoodProperties.Builder() .fast() .alwaysEat() .nutrition(0) .saturationMod(0) .effect(() -> new MobEffectInstance(MobEffects.HEAL, 1, 3), 1.0f) .build(); }

(Sorry for the real shi formatting, don't really know how to do it smh, note im also fairly new to Java so i don't know a lot, please be patient and let me know if the error is simply a lack of understand of Java principles)

By vastlysucks · Posted Wednesday at 09:01 AM1 day
Medium-sized modpack crashing when loading new chunks occasionally. (crash report)

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By TileEntity · Wednesday at 06:04 AM1 day

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"Error: java.lang.NoClassDefFoundError:vazkii/arl/item/BasicItem" crash upon launching game

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