A fatal error occurred during conversion.

[1Lazarus0]

Chunker Version

1.15.0-main-49e067a

Input World Version

Bedrock 1.26.0

Output World Version

Java 1.21.1

Platform / Operating System

win32-x64-10.0.26200

Issue Description

Error Displayed: A fatal error occurred during conversion.
Stack Trace:

java.util.concurrent.CompletionException: java.lang.IllegalArgumentException: Could not read list with length 1668808705
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture.uniHandle(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(Unknown Source)
	at com.hivemc.chunker.scheduling.task.Environment.cancel(Environment.java:85)
	at com.hivemc.chunker.conversion.WorldConverter.cancel(WorldConverter.java:617)
	at com.hivemc.chunker.conversion.WorldConverter.logFatalException(WorldConverter.java:449)
	at com.hivemc.chunker.scheduling.task.executor.TaskExecutor.handleException(TaskExecutor.java:109)
	at com.hivemc.chunker.scheduling.task.WrappedTask.lambda$setupFuture$0(WrappedTask.java:57)
	at java.base/java.util.concurrent.CompletableFuture.uniHandle(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(Unknown Source)
	at com.hivemc.chunker.scheduling.task.executor.TaskExecutorSupplier.run(TaskExecutorSupplier.java:44)
	at com.hivemc.chunker.scheduling.task.executor.TaskExecutor.threadLoop(TaskExecutor.java:178)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: Could not read list with length 1668808705
	at com.hivemc.chunker.nbt.tags.collection.ListTag.decodeValue(ListTag.java:156)
	at com.hivemc.chunker.nbt.tags.collection.CompoundTag.decodeValue(CompoundTag.java:111)
	at com.hivemc.chunker.nbt.tags.Tag.decodeNamed(Tag.java:598)
	at com.hivemc.chunker.conversion.encoding.bedrock.base.reader.BedrockColumnReader.readBlockEntities(BedrockColumnReader.java:239)
	at com.hivemc.chunker.scheduling.function.ThrowableConsumer.invoke(ThrowableConsumer.java:20)
	at com.hivemc.chunker.scheduling.function.ThrowableConsumer.invoke(ThrowableConsumer.java:8)
	at com.hivemc.chunker.scheduling.task.WrappedTask.apply(WrappedTask.java:84)
	at com.hivemc.chunker.scheduling.task.WrappedTask$WrappedTaskConstant.apply(WrappedTask.java:129)
	at com.hivemc.chunker.scheduling.task.WrappedTask.get(WrappedTask.java:77)
	at com.hivemc.chunker.scheduling.task.executor.TaskExecutorSupplier.run(TaskExecutorSupplier.java:42)
	... 2 more

[FormallyMyles]

The error you're seeing is related to it not being able to read the world, in some cases you may find opening it with Minecraft then saving and closing Minecraft fixes the issue and allows Chunker to read it. Otherwise, it's not possible for Chunker to convert the world, if it is a marketplace world it may be encrypted which Chunker is also unable to handle.