The AW mob spawner, that worked so well in 1.6.4 does not work in 1.7.10 - it crashes the game when any attempt to access it is made. This makes completion of structures and dungeons impossible.

I currently have 360+ finished structures - Faction structures, dungeons, bandit lairs, wonders, terrain pieces, mines, towns, villages, islands etc created for use and publication in the AW system for its users. Many of these structures were donated by others. It would be a shame not to see them made available.

Log of crash

Advanced Mob Spawner block, is it ?
There is some InventoryTweaks stuff going on in this crash log. Might not be related.

I don't use Inventory Tweaks, but the crash still happens. Do you want a log?

Sorry, didn't get this notification 'till now. I'll get a clean log in to you today.

..16 days later. Sorry about that.

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 14/03/15 5:15 AM
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:620)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

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

-- Head --
Stacktrace:
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:620)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)

-- Ticking connection --
Details:
Connection: net.minecraft.network.NetworkManager@c11440f
Stacktrace:
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_31, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 3779238536 bytes (3604 MB) / 4260102144 bytes (4062 MB) up to 4260102144 bytes (4062 MB)
Mod Pack: Unknown / None
LiteLoader Mods: none
LaunchWrapper: 17 active transformer(s)
- Transformer: cpw.mods.fml.common.asm.transformers.PatchingTransformer
- Transformer: com.mumfrey.liteloader.transformers.event.EventProxyTransformer
- Transformer: com.mumfrey.liteloader.launch.LiteLoaderTransformer
- Transformer: com.mumfrey.liteloader.client.transformers.CrashReportTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.MarkerTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.SideTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.EventSubscriptionTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.DeobfuscationTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.AccessTransformer
- Transformer: net.minecraftforge.transformers.ForgeAccessTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.ModAccessTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.ItemStackTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.TerminalTransformer
- Transformer: com.mumfrey.liteloader.client.transformers.LiteLoaderEventInjectionTransformer
- Transformer: com.mumfrey.liteloader.client.transformers.MinecraftOverlayTransformer
- Transformer: com.mumfrey.liteloader.common.transformers.LiteLoaderPacketTransformer
- Transformer: cpw.mods.fml.common.asm.transformers.ModAPITransformer
JVM Flags: 9 total; -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CICompilerCountPerCPU -XX:+TieredCompilation -XX:-OmitStackTraceInFastThrow -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms4096m -Xmx4096m -XX:PermSize=512m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
FML: MCP v9.05 FML v7.10.85.1291 Minecraft Forge 10.13.2.1291 9 mods loaded, 9 mods active
mcp{9.05} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.85.1291} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.2.1291} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AncientWarfare{2.4.83-beta-MC1.7.10} Ancient Warfare Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AncientWarfareAutomation{2.4.83-beta-MC1.7.10} Ancient Warfare Automation Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AncientWarfareNEIPlugin{2.4.83-beta-MC1.7.10} Ancient Warfare NEI Plugin Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AncientWarfareNpc{2.4.83-beta-MC1.7.10} Ancient Warfare NPCs Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AncientWarfareStructure{2.4.83-beta-MC1.7.10} Ancient Warfare Structures Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
AncientWarfareVehicle{2.4.83-beta-MC1.7.10} Ancient Warfare Vehicles Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['Dulciphi'/46, l='New World', x=-53.82, y=64.00, z=17.23]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

Fixed