Game crash when saving schematic

[Algaart]

My gmae keeps crashing when trying to save schematic. Even tried it with just 4 blocks

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 10.07.16 10:38
Description: Exception in server tick loop

java.lang.IllegalAccessError: tried to access method net.minecraft.nbt.NBTTagCompound.func_150298_a(Ljava/lang/String;Lnet/minecraft/nbt/NBTBase;Ljava/io/DataOutput;)V from class com.github.lunatrius.schematica.world.schematic.SchematicFormat
    at com.github.lunatrius.schematica.world.schematic.SchematicFormat.writeToFile(SchematicFormat.java:61)
    at com.github.lunatrius.schematica.world.schematic.SchematicFormat.writeToFileAndNotify(SchematicFormat.java:79)
    at com.github.lunatrius.schematica.handler.QueueTickHandler.processQueue(QueueTickHandler.java:71)
    at com.github.lunatrius.schematica.handler.QueueTickHandler.onServerTick(QueueTickHandler.java:46)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_7_QueueTickHandler_onServerTick_ServerTickEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
    at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:253)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:649)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:152)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481)
    at java.lang.Thread.run(Thread.java:745)


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

-- System Details --
Details:
    Minecraft Version: 1.8.9
    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: 724360880 bytes (690 MB) / 1906356224 bytes (1818 MB) up to 4281597952 bytes (4083 MB)
    JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4096M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.19 Powered by Forge 11.15.1.1722 5 mods loaded, 5 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{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    UCHIJAAAA   FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1722.jar) 
    UCHIJAAAA   Forge{11.15.1.1722} [Minecraft Forge] (forge-1.8.9-11.15.1.1722.jar) 
    UCHIJAAAA   LunatriusCore{1.1.2.32} [LunatriusCore] (LunatriusCore-1.8.9-1.1.2.32-universal.jar) 
    UCHIJAAAA   Schematica{1.7.7.143} [Schematica] (Schematica-1.8.9-1.7.7.143-universal.jar) 
    Loaded coremods (and transformers): 
    GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
    Profiler Position: N/A (disabled)
    Player Count: 1 / 8; [EntityPlayerMP['Algaart'/97, l='New World', x=902,72, y=5,00, z=806,12]]
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'

[Lunatrius]

• What launcher do you use?
• Have you tried updating Forge to the latest version (11.15.1.1902) for 1.8.9?
• Is there any reason to still use a 1.8.9 version of the mod, when my mods are already released for 1.10.2 (and my mods seem to be the only ones that you're using)?

[Algaart]

Normal minecraft launcher. Yes i tried and i use 1.8.9 because i need it for a 1.8.9 server

[Lunatrius]

Try Forge 11.15.0.1656

[Lunatrius]

Closing this as a non issue, if it still didn't/doesn't work feel free to re-open the issue.