i had creat an mod in 1.16.1 and when i creat a new world i get the following stactrace:

 

java.util.concurrent.CompletionException: net.minecraft.crash.ReportedException: Feature placement
    at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[?:?] {}
    at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[?:?] {}
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1155) ~[?:?] {}
    at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] {}
    at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.lambda$func_219069_a$1(ChunkTaskPriorityQueueSorter.java:44) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveOne(DelegatedTaskExecutor.java:95) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.driveWhile(DelegatedTaskExecutor.java:139) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(DelegatedTaskExecutor.java:107) ~[?:?] {re:classloading}
    at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1429) ~[?:?] {}
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] {}
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?] {}
Caused by: net.minecraft.crash.ReportedException: Feature placement
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$18(ChunkManager.java:558) ~[?:?] {re:classloading}
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-3.0.25.jar:?] {re:classloading}
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$20(ChunkManager.java:545) ~[?:?] {re:classloading}
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] {}
    ... 11 more
Caused by: java.lang.IllegalArgumentException: bound must be positive
    at java.util.Random.nextInt(Random.java:388) ~[?:?] {}
    at net.minecraft.world.gen.placement.CountRange.lambda$getPositions$0(CountRange.java:18) ~[?:?] {re:classloading}
    at java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) ~[?:?] {}
    at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) ~[?:?] {}
    at java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:699) ~[?:?] {}
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] {}
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] {}
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] {}
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] {}
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {}
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) ~[?:?] {}
    at net.minecraft.world.gen.placement.Placement.func_236963_a_(Placement.java:80) ~[?:?] {re:classloading}
    at net.minecraft.world.gen.placement.ConfiguredPlacement.func_236953_a_(ConfiguredPlacement.java:27) ~[?:?] {re:classloading}
    at net.minecraft.world.gen.feature.DecoratedFeature.func_230362_a_(DecoratedFeature.java:17) ~[?:?] {re:classloading}
    at net.minecraft.world.gen.feature.DecoratedFeature.func_230362_a_(DecoratedFeature.java:11) ~[?:?] {re:classloading}
    at net.minecraft.world.gen.feature.ConfiguredFeature.func_236265_a_(ConfiguredFeature.java:38) ~[?:?] {re:classloading}
    at net.minecraft.world.biome.Biome.func_235061_a_(Biome.java:409) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.gen.ChunkGenerator.func_230351_a_(ChunkGenerator.java:186) ~[?:?] {re:classloading}
    at net.minecraft.world.chunk.ChunkStatus.lambda$static$9(ChunkStatus.java:77) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.chunk.ChunkStatus.doGenerationWork(ChunkStatus.java:198) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$18(ChunkManager.java:547) ~[?:?] {re:classloading}
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-3.0.25.jar:?] {re:classloading}
    at net.minecraft.world.server.ChunkManager.lambda$func_223156_b$20(ChunkManager.java:545) ~[?:?] {re:classloading}
    at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] {}
    ... 11 more

this is the code where i think weher is the error

 

package net.luis.cave.world.gen;

import net.luis.cave.Cave;
import net.luis.cave.init.CaveBlocks;
import net.minecraft.block.BlockState;
import net.minecraft.block.Blocks;
import net.minecraft.block.pattern.BlockMatcher;
import net.minecraft.world.biome.Biome;
import net.minecraft.world.gen.GenerationStage;
import net.minecraft.world.gen.feature.Feature;
import net.minecraft.world.gen.feature.OreFeatureConfig;
import net.minecraft.world.gen.placement.ConfiguredPlacement;
import net.minecraft.world.gen.placement.CountRangeConfig;
import net.minecraft.world.gen.placement.Placement;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.event.lifecycle.FMLLoadCompleteEvent;
import net.minecraftforge.registries.ForgeRegistries;

@Mod.EventBusSubscriber(modid = Cave.Mod_Id, bus = Mod.EventBusSubscriber.Bus.MOD)
public class OreGen {
	
	@SubscribeEvent
	public static void generateOres(FMLLoadCompleteEvent event) {
		
		for (Biome biome : ForgeRegistries.BIOMES) {
			
			if (biome.getCategory() == Biome.Category.THEEND) {
			
				genOre(biome, 1, 12, 256, 10, OreFeatureConfig.FillerBlockType.create("ENDSTONE", "end_stone", new BlockMatcher(Blocks.END_STONE)), CaveBlocks.ENDERITE_ORE.get().getDefaultState(), 3);
				
			} else if (biome.getCategory() == Biome.Category.NETHER) {
				
				
				
			} else {
				
				genOre(biome, 15, 8, 50, 5, OreFeatureConfig.FillerBlockType.NATURAL_STONE, CaveBlocks.JADE_ORE.get().getDefaultState(), 6);
				
				genOre(biome, 7, 1, 25, 1, OreFeatureConfig.FillerBlockType.NATURAL_STONE, CaveBlocks.LIMONITE_ORE.get().getDefaultState(), 10);
			
				genOre(biome, 2, 1, 65, 1, OreFeatureConfig.FillerBlockType.NATURAL_STONE, CaveBlocks.ROSITE_ORE.get().getDefaultState(), 1);
				
				genOre(biome, 5, 4, 9, 1, OreFeatureConfig.FillerBlockType.NATURAL_STONE, CaveBlocks.SAPHIRE_ORE.get().getDefaultState(), 2);
				
			}
			
		}
		
	}

	private static void genOre(Biome biome, int count, int bottomOffset, int topOffset, int max, OreFeatureConfig.FillerBlockType filler, BlockState defaultBlockstate, int size) {
		
		CountRangeConfig range = new CountRangeConfig(count, bottomOffset, topOffset, max);
		OreFeatureConfig feature = new OreFeatureConfig(filler, defaultBlockstate, size);
		ConfiguredPlacement config = Placement.COUNT_RANGE.configure(range);
		biome.addFeature(GenerationStage.Decoration.UNDERGROUND_ORES, Feature.ORE.withConfiguration(feature).withPlacement(config));
		
	}

}

 

11 hours ago, diesieben07 said:

 

Yes i know but where is negativ number 

1 hour ago, Luis_ST said:

Yes i know but where is negativ number 

If I remember correctly (has been a while since I had math though) 5 - 50 is a negative number. If you check out the getPositions() method in the CountRange class you will see that maximum - topOffset is used at the bound to a nextInt() call, and therefore has to be positive.

16 hours ago, diesieben07 said:

 

Okay thanks for helping