[21:13:43 WARN]: java.util.zip.ZipException: Not in GZIP format
[21:13:43 WARN]:        at java.util.zip.GZIPInputStream.readHeader(Unknown Source)
[21:13:43 WARN]:        at java.util.zip.GZIPInputStream.<init>(Unknown Source)
[21:13:43 WARN]:        at java.util.zip.GZIPInputStream.<init>(Unknown Source)
[21:13:43 WARN]:        at com.sk89q.worldedit.extent.clipboard.io.SchematicWriter$1.write(SchematicWriter.java:225)
[21:13:43 WARN]:        at com.sk89q.jnbt.NBTOutputStream.writeLazyCompoundTag(NBTOutputStream.java:170)
[21:13:43 WARN]:        at com.sk89q.worldedit.extent.clipboard.io.SchematicWriter.stream(SchematicWriter.java:143)
[21:13:43 WARN]:        at com.sk89q.worldedit.extent.clipboard.io.SchematicWriter.write(SchematicWriter.java:118)
[21:13:43 WARN]:        at com.boydti.fawe.object.schematic.Schematic.save(Schematic.java:103)
[21:13:43 WARN]:        at com.boydti.fawe.object.schematic.Schematic.save(Schematic.java:89)
[21:13:43 WARN]:        at de.c0din.eldocore.maintenance.SchematicManager.saveSchematic(SchematicManager.java:33)
[21:13:43 WARN]:        at de.c0din.eldocore.maintenance.TestCommand.onCommand(TestCommand.java:23)
[21:13:43 WARN]:        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[21:13:43 WARN]:        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
[21:13:43 WARN]:        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:647)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1386)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1221)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13)
[21:13:43 WARN]:        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[21:13:43 WARN]:        at java.util.concurrent.FutureTask.run(Unknown Source)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679)
[21:13:43 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577)
[21:13:43 WARN]:        at java.lang.Thread.run(Unknown Source)