I get AL lib: (EE) alc_cleanup: 1 device not closed when I try to play my minecraft mod in Eclipse. I can start the game, but when I try to create a world or play a world, it crashes. I have no errors in Eclipse either. I only get this crash if I have this typed in under my PreInit: GameRegistry.registerWorldGenerator(eventWorldGen, 0);

But if I delete that line, my mod's ores won't generate into the world . Can someone help? It would be GREATLY appreciated!

Here is the full crash report:

 

---- Minecraft Crash Report ----

// Hey, that tickles! Hehehe!

 

Time: 20/09/14 7:50 AM

Description: Exception in server tick loop

 

java.lang.IllegalArgumentException: n must be positive

at java.util.Random.nextInt(Unknown Source)

at net.epicraft.mod.worldgen.EpiCraftWorldGen.addOreSpawn(EpiCraftWorldGen.java:43)

at net.epicraft.mod.worldgen.EpiCraftWorldGen.generateSurface(EpiCraftWorldGen.java:28)

at net.epicraft.mod.worldgen.EpiCraftWorldGen.generate(EpiCraftWorldGen.java:20)

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:263)

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1163)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:157)

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:307)

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:79)

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:96)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:442)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:746)

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- System Details --

Details:

Minecraft Version: 1.7.2

Operating System: Windows 8.1 (amd64) version 6.3

Java Version: 1.7.0_67, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 899731488 bytes (858 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)

JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95

FML: MCP v9.03 FML v7.2.211.1121 Minecraft Forge 10.12.2.1121 4 mods loaded, 4 mods active

mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

FML{7.2.211.1121} [Forge Mod Loader] (forgeSrc-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

Forge{10.12.2.1121} [Minecraft Forge] (forgeSrc-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

EpiCraft{v1.0 Beta} [EpiCraft] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

Profiler Position: N/A (disabled)

Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Player Count: 0 / 8; []

Type: Integrated Server (map_client.txt)

Is Modded: Definitely; Client brand changed to 'fml,forge'

java.lang.IllegalArgumentException: n must be positive

  at java.util.Random.nextInt(Unknown Source)

  at net.epicraft.mod.worldgen.EpiCraftWorldGen.addOreSpawn(EpiCraftWorldGen.java:43)

There's the issue... In the EpiCraftWorldGen class line number 43, you have a call to random.nextInt(int), in which the int < 0.

Problem fixed! Thanks larsgerrits for showing me where it was.

 

The problem was this: int posY = minY + random.nextInt(maxY - minY);

I accidentally misspelled it and put that - inbetween maxY and minY while it had to be an = sign.

I changed it to this: int posY = minY + random.nextInt(maxY = minY); now it works!

You could've easily figured that out yourself... You need to learn how to read crash reports...