The game client crashes periodically when AW attempts to generate a structure.

---- Minecraft Crash Report ----
// Why did you do that?

Time: 7/3/15 7:36 AM
Description: Exception in server tick loop

java.lang.RuntimeException: Caught exception while constructing template blocks: Vanilla Block Rule id: minecraft:stonebrick meta: 0 buildPass: 0
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilder.instantConstruction(StructureBuilder.java:105)
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilderWorldGen.instantConstruction(StructureBuilderWorldGen.java:94)
at net.shadowmage.ancientwarfare.structure.world_gen.WorldGenTickHandler$StructureGenerationTicket.call(WorldGenTickHandler.java:132)
at net.shadowmage.ancientwarfare.structure.world_gen.WorldGenTickHandler.genStructures(WorldGenTickHandler.java:90)
at net.shadowmage.ancientwarfare.structure.world_gen.WorldGenTickHandler.serverTick(WorldGenTickHandler.java:49)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_37_WorldGenTickHandler_serverTick_ServerTickEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at cpw.mods.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:247)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:590)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
Caused by: java.lang.NullPointerException
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilder.placeBlock(StructureBuilder.java:151)
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilderWorldGen.placeBlock(StructureBuilderWorldGen.java:59)
at net.shadowmage.ancientwarfare.structure.template.plugin.default_plugins.block_rules.TemplateRuleVanillaBlocks.handlePlacement(TemplateRuleVanillaBlocks.java:59)
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilder.placeRule(StructureBuilder.java:197)
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilder.placeCurrentPosition(StructureBuilder.java:170)
at net.shadowmage.ancientwarfare.structure.template.build.StructureBuilder.instantConstruction(StructureBuilder.java:100)
... 12 more

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

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 495821848 bytes (472 MB) / 1427988480 bytes (1361 MB) up to 2134114304 bytes (2035 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
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 v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1448 Optifine OptiFine_1.7.10_HD_B6 41 mods loaded, 41 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.05} Minecraft Coder Pack
UCHIJAAAA FML{7.10.99.99} Forge Mod Loader
UCHIJAAAA Forge{10.13.4.1448} Minecraft Forge
UCHIJAAAA CodeChickenCore{1.0.7.46} CodeChicken Core
UCHIJAAAA NotEnoughItems{1.0.5.111} Not Enough Items
UCHIJAAAA ThaumicTinkerer-preloader{0.1} Thaumic Tinkerer Core
UCHIJAAAA {000} CoFH ASM
UCHIJAAAA AncientWarfare{2.4.106-beta-MC1.7.10} Ancient Warfare Core
UCHIJAAAA CoFHCore{1.7.10R3.0.2} CoFH Core
UCHIJAAAA AncientWarfareAutomation{2.4.106-beta-MC1.7.10} Ancient Warfare Automation
UCHIJAAAA AncientWarfareNEIPlugin{2.4.106-beta-MC1.7.10} Ancient Warfare NEI Plugin
UCHIJAAAA AncientWarfareNpc{2.4.106-beta-MC1.7.10} Ancient Warfare NPCs
UCHIJAAAA AncientWarfareStructure{2.4.106-beta-MC1.7.10} Ancient Warfare Structures
UCHIJAAAA MovingWorld{1.7.10-1.7.12B} Moving World
UCHIJAAAA ArchimedesShipsPlus{1.7.10-1.7.12} Archimedes' Ships Plus
UCHIJAAAA Baubles{1.0.1.10} Baubles
UCHIJAAAA Artifacts{1.1.2} Artifacts
UCHIJAAAA BiblioCraft{1.10.4} [BiblioCraft](BiblioCraft[v1.10.4][MC1.7.10] %281%29.jar)
UCHIJAAAA Thaumcraft{4.2.3.5} Thaumcraft
UCHIJAAAA Botania{r1.6-197} [Botania](Botania r1.6-197.jar)
UCHIJAAAA CarpentersBlocks{3.3.6} [Carpenter's Blocks](Carpenter's Blocks v3.3.6 - MC 1.7.10.jar)
UCHIJAAAA chococraft{4.1.5} Clienthax's ChocoCraft
UCHIJAAAA props{2.0.2} Decocraft
UCHIJAAAA eplus{3.0.2-d} Enchanting Plus
UCHIJAAAA EnderZoo{1.7.10-1.0.11.28} Ender Zoo
UCHIJAAAA enhancedportals{3.0.12} EnhancedPortals
UCHIJAAAA Mantle{1.7.10-0.3.2.jenkins184} Mantle
UCHIJAAAA Natura{2.2.0} Natura
UCHIJAAAA Waila{1.5.10} Waila
UCHIJAAAA TConstruct{1.7.10-1.8.5.build957} Tinkers' Construct
UCHIJAAAA ExtraTiC{1.4.5} ExtraTiC
UCHIJAAAA farlanders{1.2b} The Farlanders
UCHIJAAAA GraveStone{2.12.3} GraveStone
UCHIJAAAA GrimoireOfGaia{1.0.0} Grimoire of Gaia 3
UCHIJAAAA HardcoreEnderExpansion{1.8.2} [Hardcore Ender Expansion](HardcoreEnderExpansion MC-1.7.10 v1.8.2.jar)
UCHIJAAAA inventorytweaks{1.58-147-645ca10} Inventory Tweaks
UCHIJAAAA journeymap{@Jmversion@} JourneyMap
UCHIJAAAA movillages{1.2.1} Mo' Villages
UCHIJAAAA ThaumicTinkerer{unspecified} Thaumic Tinkerer
UCHIJAAAA TwilightForest{2.3.7} The Twilight Forest
UCHIJAAAA witchery{0.24.1} Witchery
CoFHCore: -[1.7.10]3.0.2-285
Mantle Environment: DO NOT REPORT THIS CRASH! Unsupported mods in environment: optifine
TConstruct Environment: Environment healthy.
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['Kosta_Lott'/178, l='New World', x=223.83, y=83.00, z=496.83]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

yes i can say i have received the same crash. I was playing around with MCHeli and when i was flying over a wooden structure, i was greeted not so kindly by this crash log. http://pastebin.com/S1igAEzB
at the time of THIS crash i WAS using optifine, i have removed optifine, reloaded the game and the same thing happened thanks for the help in advance :D

Edit: Converted Tired ramblings into an English that could be read 😄