Client Crash

---- Minecraft Crash Report ----
// Oops.

Time: 2/20/18 4:01 PM
Description: Exception ticking world

java.lang.NullPointerException: Exception ticking world
	at mcjty.rftools.blocks.shield.ShieldTEBase.writeClientDataToNBT(ShieldTEBase.java:975)
	at mcjty.lib.entity.GenericTileEntity.func_189518_D_(GenericTileEntity.java:123)
	at net.minecraft.server.management.PlayerChunkMapEntry.func_187273_a(PlayerChunkMapEntry.java:288)
	at net.minecraft.server.management.PlayerChunkMapEntry.func_187280_d(PlayerChunkMapEntry.java:250)
	at net.minecraft.server.management.PlayerChunkMap.func_72693_b(SourceFile:115)
	at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:227)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:754)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at mcjty.rftools.blocks.shield.ShieldTEBase.writeClientDataToNBT(ShieldTEBase.java:975)
	at mcjty.lib.entity.GenericTileEntity.func_189518_D_(GenericTileEntity.java:123)
	at net.minecraft.server.management.PlayerChunkMapEntry.func_187273_a(PlayerChunkMapEntry.java:288)
	at net.minecraft.server.management.PlayerChunkMapEntry.func_187280_d(PlayerChunkMapEntry.java:250)
	at net.minecraft.server.management.PlayerChunkMap.func_72693_b(SourceFile:115)
	at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:227)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [EntityPlayerMP['016Nojr'/2136, l='New World', x=299.44, y=64.00, z=254.89]]
	Chunk stats: ServerChunkCache: 626 Drop: 0
	Level seed: 8169723022208930139
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (296,64,253), Chunk: (at 8,4,13 in 18,15; contains blocks 288,0,240 to 303,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 459 game time, 459 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 166527 (now: false), thunder time: 177182 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:754)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.12.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 507617264 bytes (484 MB) / 2221408256 bytes (2118 MB) up to 4772593664 bytes (4551 MB)
	JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx5120m -Xms256m -XX:PermSize=256m
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	FML: MCP 9.42 Powered by Forge 14.23.2.2618 7 mods loaded, 7 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

	| State     | ID         | Version         | Source                         | Signature                                |
	|:--------- |:---------- |:--------------- |:------------------------------ |:---------------------------------------- |
	| UCHIJAAAA | minecraft  | 1.12.2          | minecraft.jar                  | None                                     |
	| UCHIJAAAA | mcp        | 9.42            | minecraft.jar                  | None                                     |
	| UCHIJAAAA | FML        | 8.0.99.99       | forge-1.12.2-14.23.2.2618.jar  | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| UCHIJAAAA | forge      | 14.23.2.2618    | forge-1.12.2-14.23.2.2618.jar  | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| UCHIJAAAA | mantle     | 1.12-1.3.1.21   | Mantle-1.12-1.3.1.21.jar       | None                                     |
	| UCHIJAAAA | rftools    | 7.29            | rftools-1.12-7.29.jar          | None                                     |
	| UCHIJAAAA | tconstruct | 1.12.2-2.9.1.65 | TConstruct-1.12.2-2.9.1.65.jar | None                                     |

	Loaded coremods (and transformers): 
	GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
	Pulsar/tconstruct loaded Pulses: 
		- TinkerCommons (Enabled/Forced)
		- TinkerWorld (Enabled/Not Forced)
		- TinkerTools (Enabled/Not Forced)
		- TinkerHarvestTools (Enabled/Forced)
		- TinkerMeleeWeapons (Enabled/Forced)
		- TinkerRangedWeapons (Enabled/Forced)
		- TinkerModifiers (Enabled/Forced)
		- TinkerSmeltery (Enabled/Not Forced)
		- TinkerGadgets (Enabled/Not Forced)
		- TinkerOredict (Enabled/Forced)
		- TinkerIntegration (Enabled/Forced)
		- TinkerFluids (Enabled/Forced)
		- TinkerMaterials (Enabled/Forced)
		- TinkerModelRegister (Enabled/Forced)

	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [EntityPlayerMP['016Nojr'/2136, l='New World', x=299.44, y=64.00, z=254.89]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'fml,forge'